How do I check the water quality and how often should I test it?

How important is it to check it?  Let’s just have a brief run through the elements we need to monitor and then compile a quick go-to list to simplify it.

We need to check:-

1.   Sanitiser – Chlorine or Bromine. Levels should be:- Free chlorine – 3-5ppm, Bromine 4-6ppm 

2.   Alkalinity. This should be between 80-120ppm

3.   pH level – For chlorine users, this should be around 7.2 – 7.6. For bromine users it should be around 7.0 – 7.4.  Values below these ranges indicate that the water is too acidic or if above, too alkaline both of which can have a negative impact on the effectiveness of sanitiser, water quality and can damage parts of the hot tub. The water can also cause irritation to eyes. High alkalinity can also cause the water to become cloudy.

4.  Total Hardness. This is a measure of the dissolved minerals in the water, usually calcium and magnesium. Ideally, this should be between 100-250ppm. If the water is too hard , scale may form and the water may be cloudy. Tap water in the south east of the UK is hard water. Soft water may draw minerals from metal parts it is in contact with and cause damage.

5.     Total Dissolved Solids (TDS).  Chemicals, minerals, and other soluble materials can build up over time causing dull water and reducing the effectiveness of the chemicals used to maintain water quality. Testing should take place regularly every few weeks give or take depending on hot tub usage.

6.     Bacteria. Your hot tub can provide bacteria with the ideal environment to thrive and grow. Bacteria test strips can test for E.coli, Pseudomonas aeruginosa and many other coliform and non-coliform bacteria, with the results in around 15 minutes. These strips are readily available at retailers and online.

7.     Visually check water clarity and foaming. Check out our Filter Care topic ‘Hot Tub foam. What the bubble is going on?’

8.     Check filters. These should be checked regularly for contamination, build up of dirt, sludge and other solids. Read our Filter Care Topic ‘How to clean a hot tub filter’ for more information.

It is arguably easier and more time-efficient to test regularly and treat accordingly working to maintain high water quality rather than ignore it until it drops to an almost irrecoverable quality. 

To maintain the water quality – Most important is to reduce or remove sources of contamination, i.e., organic materials, suntan lotion, fake tan, make-up, contaminated bathing wear (detergent/ softener residue), soap, shampoo, body dirt, body oils, bather load, filter maintenance, cosmetics, food and drink spilled in and around the hot tub. These all add to the filter workload and all contribute to degrading the quality of the water that you bathe in.

Don’t allow contamination to enter the water in the first place, practice strict hygiene (shower before bathing etc), and ensure hair is clean and kept clear of the water. 

Poor filtration through dirty, clogged or poor quality filters can cause milky or cloudy water, unpleasant odours and sanitiser levels to drop rapidly. Biofilm can also form on fixtures, in  pipework and other areas where it cannot easily be seen. Not pleasant to bathe in!  

Water balance – Balancing the water in your hot tub is the number one factor to maximising the life and appearance of your hot tub and water. Correct water balance ensures that the water is not scale forming or corrosive and will enhance your bathing experience. Balanced water ensures that the sanitiser works to maximum effect helping to protect the hot tub shell, equipment, water quality and enhance your hot tub experience.

To sum up in one list:-

1. Sanitiser

2. Alkalinity

3. PH level

4. Total hardness

5. Total Dissolved Solids (TDS)

6. Bacteria

7. Clarity and Foaming

8. Filters.

Hopefully, this information will help you to enjoy a wonderful hot tub experience with enticingly clear water 

If you are looking for more information or have any suggestions for other hot tub Filter Care topics, please do not hesitate to get in touch. We will do what we can to help 

Happy hot tubbing!!!

The Darlly Team 

When searching for replacement hot tub filters, if you do not have the part number of the quality Darlly filters required, use our quick-to-use comprehensive ‘Find your filter’ helper pages in our online catalogue. By using measurements and by matching the thread type pictures, you should be able to find the quality filter your hot tub deserves.

You can use the dimensions that you have to help get to the required filter. How do you measure a filter? Easy! Follow our easy-to-use guide below showing how to measure the relevant dimensions and identify the thread type, if any. All measurements are in cm.

External diameter

This is the measurement across the filter from edge to edge. This example is 12cm.

Length

Measure the length of the filter but do not include the handle or thread.

Internal / Inside diameter

Thread and fitting types

There are number of different types of fitting and thread types available. Filters can have male and female threads which can be coarse or fine, and possibly tapered.

Photo shows male threads, fine on the left hand side and coarse on the right hand side.

Measure the thread diameter. This is the outer edges of the thread for male thread. For a female thread, measure the inner diameter.

The Fine Thread (MPT) has from 6 – 8 fine twists (Pleatco ends P4 or F2M) whereas the Coarse Thread (SAE) will have as little as only 3 thicker threads (Pleatco ends P3 or F2S). 

Male thread diameter measurement

Female thread diameter measurement

You now have all the dimensions that you will need to help identify your filter.

Just two more items to note now, nearly there!  

What is the original colour of the actual filter fabric? If it is white, it is a normal filter. 

If it is blue, it is probably a Silverstream Antibacterial filter. 

The last item relates to the top of the filter. Does it have a removeable twist-and-pull lid? 

If yes, this will be a Sanistream filter designed to take an in-line dosing pod such as the Darlly Sanistream DL815 SpaPod (suitable for chlorine or bromine tablets) or a Darlly DL816 AquaSPArkle Pod which is ready-filled with sufficient bromine tablets to last you up to a month. 

You should now have all the information you need to identify your filter on the Darlly ‘Find your filter’ pages in the online catalogue.

All genuine Darlly filters have the part number moulded on the end cap (eg “60401”)

Also the label on the outer wrapper will have all details. (Please keep this for next time …..! )

Pleatco and Unicel will also sometimes have the part number on the end cap. Our brochure and website www.darlly.eu contain all of the part numbers to help you. 

However, should you be without any part number after following the identification guide above and using our ‘Find a Filter’ guide using your measurements and brand identities, simply call us on +44 (0)1952 – 580500 we would be delighted to help you. 

If you have any suggestions for hot tub / spa topics or subjects that you would like to read about in our filter care section please get in touch and we will be more than happy to help 

Happy Hot Tubbing!  

Let’s start with Inline sanitization / dosing. This is a method of water treatment that takes place in the actual pumped water flow usually in the filter circuit. 

It is a low maintenance method of adding chlorine or bromine to the water, usually in the form of tablets enclosed in a small pod. The pod is located inside the hot tub filter and is adjustable to allow the dosage to be tailored to the particular application.  

Darlly Sanistream® filters

Darlly Europe’s revolutionary Sanistream® Direct filtration system is a new and unique technology which combines the world’s finest hot tub filters with a safe, convenient and effective sanitiser dispenser to give an integrated spa water treatment system. Sanistream® is suitable for domestic hot tubs and it also allows compliance with Section 76 of HSG282 regulations for hot tubs installed in holiday let units. 

DL 815 SpaPod 

The SpaPod is designed for use in Darlly Sanistream® filters. The SpaPod simply twist clicks into place on the bottom of the Darlly SaniStream filter lid. The Pod is a watertight canister pod capable of holding 5-6 chlorine or bromine tablets with a controllable flow output. The tablets should last, with normal operation, 2-3 weeks. 

Easy to use, safer sanitation and cost effective. SpaPod does not come with any Chlorine or Bromine, simply add your choice when necessary. 

SC800 Nature 2 

Nature2 SPA is perfect for spa owners looking for an eco-friendly, low maintenance alternative to heavy chlorine or bromine to keep their spa clean and free of harmful bacteria and viruses. Nature2 SPA uses an EPA-approved mineral bed technology to effectively kill bacteria safely and effortlessly.

DL 816 AquaSPArkle Pod 

For use in Darlly Sanistream® filters, the AquSPArkle Bromine Pod (Chlorine Pod following shortly) is a larger version of the SpaPod but comes ready filled with enough Bromine Tablets to last you up to a month. 

(Available in packs of 3)

There are three possible ways to use the AquaSPArkle pod:- 

a) Use in a built-in propriety hot tub dosing system or frame.

b) Use with a Darlly Sanistream open-top filter or open-top filters fitted with a centre support to retain the pod.

c) Use with a Darlly Sanistream handle-top filter that allows the pod to easily twist and click into place.

It takes a while for the bromine tablets to begin to dissolve so it may be appropriate to first shock treat to immediately establish chlorine and bromine residuals. Add the appropriate amount of shock treatment as per the product label dosing instructions. Always test your hot tub water prior to use and maintain bromine levels between 4 to 6 mg/l.

Holiday Lets hot tubs require a higher level of maintenance, service and monitoring than your domestic hot tub. Completely looking after and properly maintaining holiday let hot tubs is beyond the scope of this topic. Today, we’re just discussing the filter aspect of hot tub care and the advantages and cost benefits of using quality filters. Also included here are a couple of pointers towards the care of hot tubs in a commercial environment

To clean and inspect your filter cartridges

Cartridge filter – Definition: A replaceable filter used in domestic-type spa pools and constructed from pleated paper or wound fibres, through which water is passed for filtration. 

Remove the pleated filter cartridge and soak in a specific Cartridge Cleaner that is both acidic and a degreaser. This avoids the need for “Hosing off” with its attendant Legionella Risk from aerosolised water droplets. Gently wash off the Cartridge and then allow to dry. Hence the need for 2 sets of filter cartridges. NB: Do not use a pressure washer for this task and ensure that the power to the hot tub is turned off while the filter is removed from the hot tub. See also our topic ‘How to clean a hot tub filter’ in the ‘Filter care’ section of our website.

Top Tip: Given that it is necessary to allow a cleaned and rinsed filter to dry out before returning it to the hot tub, it is a good practice to have a spare second set of filters so that whilst one set is being cleaned, rinsed, and dried, the second set is in the hot tub filtering the water. This ensures that you can minimise cleaning downtime and the hot tub experience can be enjoyed whilst the removed filters are being cleaned. 

As with most things in life, high quality products often prove to be a more cost effective solution by being more efficient and having a long service life than a cheap product. A high-quality Darlly filter with durable and efficient filter material provides you with the quality water filtration that you and your customers demand and deserve enhancing enjoyment of the holiday hot tub experience.  

The winner of the Spa Product Of The Year Gold Award at the 2018 UK Pool & Spa Awards in Birmingham by Darlly marked the latest milestone in the rise of Darlly Europe’s unique and ground-breaking SaniStream® Direct Line Filtration system. The SaniStream system, is a high quality Darlly hot tub filter, combined with an adjustable and refillable chlorine or bromine tablet erosion feeder, called SpaPod®, to make a highly effective combined, integrated hot tub water treatment system. The SaniStream® system offers a solution to the problem posed to holiday let owners and operators by Section 76 of health and safety guidelines, HSG282, which states that hot tubs installed in a setting where used ‘… as part of a business activity (e.g. in a holiday park rental unit or hotel bedroom(s) with their own dedicated spa, or as part of a rental agreement for a single family or group use)’ must be ‘disinfected using bromine or chlorine through the use of an in-line disinfectant feeder’.

The big issue with Sec. 76 of HSG282 is that few hot tubs sold on the UK market feature inline disinfectant feeders. Worse still, HSG282 made no legacy-exemption provision, meaning many thousands of hot tubs already in the field became non-compliant overnight. 

Find out more information about complete hot tub care, including water care by following the links below.

www.bishta.co.uk    British and Irish Spa and Hot Tub association.

https://www.hse.gov.uk/pubns/books/hsg282.htm   The HSE guidelines for hot tubs.

Excerpt below is on P.22 of the above document.

Domestic-type spa pools – used as a business activity 

76. Domestic-type spa pools or hot tubs used as part of a business activity (eg in a holiday park rental unit or hotel bedroom(s) with their own dedicated spa, or as part of a rental agreement for a single family or group use) are subject to the general duties under the HSW Act. There is a legal requirement for these systems to be managed and controlled in proportion to the risk and the risk assessment should consider the type of pool and its use. Domestic-type spa pools are for use by a small, discrete group of people at any one time and are typically: 

–  of either a rigid or inflatable/foam-filled structure with freeboard and skimmer. 

–  systems where the water should be changed after each rental/week, whichever is the shorter. 

–  disinfected using bromine or chlorine through the use of an inline disinfectant feeder. 

Filtration 

95. Filtration is necessary to ensure adequate water clarity can be maintained through the removal of suspended particulate matter/debris in the water. Filtration is a means of entrapping particles mechanically and/or through absorption onto a filter medium. There are several types of system in common use and the choice of system type and size should reflect the anticipated type of use, circulation rate and bather load. Spa pools will typically only require one filtration system but multiple units and types in sequence may be appropriate, depending upon the local circumstances.

Cartridge filters – Cartridge filters are systems of tightly packed filter media such as fibreglass or paper in a demountable unit. They are small units and typically would only be used in domestic-type spa pools where the bather load and anticipated level of particulate matter was low. The design and installation should allow for removal of the cartridge for regular chemical cleaning, drying and periodic replacement. 

Excerpt Ends.

If you have any questions about our filters, please do not hesitate to get in contact, we’re always willing to help 

Happy Hot Tubbing!

The Darlly Team

Well, the time has come to change the filters in your hot tub and for the life of you, you just can’t remember the part number of the filter. There isn’t a number on the filter, you didn’t retain the packaging or the label from the last time and you don’t know how to identify them. Relax! You’ve come to the right place.

Our up-to-date online catalogue lists our complete range of filters with the dimensions and thread type or fitting.

To help us identify your filter, let us get some information together to help us find your replacement.

 We can use some or all of the following :- dimensions, fitting, manufacturers numbers, thread type (if any), hot tub manufacturer, brand etc. Does it have a closed top, a handle, open top? 

To get the dimensions, check the guide below for help how to measure the filter.

There are a couple of ways to find the filter you need now, both from the home page of our website Darlly.eu Hover above the FILTERS  dropdown then select the type of filter you are searching for.

The ‘Find your filter’ helper is on the left hand side now. Scroll down here to select any relevant details to search for your filter. If this doesn’t find your exact filter, take a look inside our latest online brochure.

Open the latest filter brochure from the home page on the darllyfilters.co.uk/brochure website. Scroll down to the ‘Find Your Filter’ pages then search with the information you have to identify your filter. 

If you have your hot tub brand, you can use this to narrow the search.

How long can I reasonably expect my hot tub filters to last, what is a realistic lifespan?

Now, there’s the $64,000 question!

There are many factors that can affect the lifespan of hot tub filters, a great deal of which we, the user, have control over and so it is mostly down to us.

Let’s start at the top with this one – Filter quality.  This is arguably the most important factor involved in filter longevity. Not only is the filtration quality important, the robustness and durability of the filter material is also key. This has a great impact on the number of times that the filter can be cleaned. A more durable filter material can be cleaned more times without damage and ‘wear and tear’ occurring than a cheaper poor-quality filter which is less able to sustain the cleaning and brushing required to return the filter to an acceptable state whilst still maintaining its original filtration qualities.

Darlly filters contain a high-quality durable filter material which ensures a longer service life able to tolerate many cleaning cycles without losing strength, integrity, and efficiency.   

Regular and careful filter maintenance.  The filters should be inspected and cleaned at regular intervals. It is important not to let the filters get too ‘overloaded’ or ‘clogged’ as this will have a detrimental effect not only on the filter but also on water quality.

The filters should be thoroughly and sympathetically cleaned to maintain the filtration efficiency, which, let’s face it, is the reason they are there! 

The filters should be removed and gently washed and brushed before soaking in a filter cleaning solution. Gently does it so as not to cause physical damage to the filter.

Use the Darlly Cyclone Filter Cleaner (SC785) filter cleaner and detergent to truly clean the filters. You wouldn’t wash your clothes without detergent 

For continuous hot tub enjoyment, having two sets of filters gives you the opportunity to quickly change the filters and then immediately continue enjoying your hot tub. The removed filters can then be cleaned and allowed to dry at a more convenient time. It is important the allow the filters to dry completely before refitting back into the hot tub.

The spare filters should be stored in a dry dust and dirt-free environment, after all, we want the filters to remove contaminants not add them!

Now, let us have a think about what we are asking the filters to do. What do we imagine that the filters will be removing from the water? There is probably a lot more being asked of the filter than we might first imagine. Dust? Dirt? Leaves? Yep, and more!

What about make-up, sunscreen, body fats, fake-tan, body dirt?

It is recommended that people shower before enjoying the hot tub as this will reduce the contaminants carried into the hot tub water. It’s all about maintaining water quality.

Taking these precautions such as regular gentle filter cleaning, reducing contaminants entering the water and generally maintaining water quality will help your filters work efficiently and considerably extend their service life. As you can see, caring for your filters can help then care for you!

Please see our other topics on Filter care, including ‘How to clean a dirty hot tub filter’. 

Find out more about quality Darlly filters on our website Darllyfilters.co.uk

We hope that this topic has been helpful. If you have any suggestions for future hot tub filter topics, please don’t hesitate to get in touch, we will do our best to help you! 

Happy Hot tubbing!

The Darlly Team

Well, it’s time to change the hot tub filters. How should I do this?  I don’t want to damage anything!

There’s nothing to fear here. This is a simple, quick and easy operation.

Firstly, how long can we expect the filters to last and how often should I change them?

If you are using your hot tub two or three times per week, you can expect quality Darlly filters to last twelve months or more depending on usage. During this time, you should be routinely gently cleaning the filters at regular intervals. Regular inspections should give you a good indication of cleaning intervals required for your hot tub usage. 

Darlly filters contain a high-quality durable filter material which ensures a longer service life, meaning they can tolerate many cleaning cycles without losing strength, integrity and efficiency.   

Dependent on the specification of your hot tub, there may be one or two filters.

To change the filters, the pumps should be turned OFF.

Remove the filter housing lid which normally unscrews or unclips. 

Next remove the leaf-catcher basket if fitted (without letting the debris into the water) This reveals the filter(s) beneath.

Carefully remove the filter without disturbing any debris captured in the filter. Depending on the filter, this will now either unscrew or just lift out with a slight twist just to release it.

When fitting new filters, if the filters have one or more thin bands around circumference of the filter pleats, this is part of the filter construction and should be left attached as it maintains the separation of the pleats.

After checking for any debris remaining in the filter area, the replacement filter(s) can now be fitted in place, ensuring bottom of filter is pushed on and is seated correctly or screwed down securely. 

Refit the leaf catcher basket and the filter housing lid ensuring that everything is fitted as designed and is secure.

Please see our other topics on filter care, including ‘How to clean a dirty hot tub filter’. 

For continuous hot tub enjoyment, having two sets of filters gives you the opportunity to quickly change the filters and then immediately continue enjoying your hot tub. The removed filters can then be cleaned and allowed to dry at a more convenient time. It is important the allow the filters to dry completely before refitting back into the hot tub.

If you will be cleaning the filters you have just removed, don’t forget to use the Darlly Cyclone Filter Cleaner (SC785) filter cleaner and detergent to truly clean the filters. You wouldn’t wash your clothes without detergent.

We hope that this topic has been helpful. If you have any suggestions for future hot tub filter topics, please don’t hesitate to get in touch, we will do our best to help you! 

Happy Hot Tubbing!!!!

The Darlly Team 

Welcome to Darlly’s ‘How should I look after holiday park hot tub filters?’ topic.

Holiday park hot tubs require a higher level of maintenance, service and monitoring than your domestic hot tub. Looking after and properly maintaining holiday park hot tubs is beyond the scope of this topic. Today, we’re just discussing filters and the advantages and cost benefits of using quality filters. 

Here at Darlly we recommend any commercial holiday let follow the guidelines of HSG 282. 

How To clean and inspect your filter cartridges

The HSG282’S definition of a hot tub filter is listed below in italic.

Cartridge filter – A replaceable filter used in domestic-type spa pools and constructed from pleated paper or wound fibres, through which water is passed for filtration. 

This paragraph is our recommended way of dealing with filters in a commercial setting. Remove the pleated filter cartridge and soak in a specific Cartridge Cleaner that is both acidic and a degreaser. This avoids the need for “Hosing off” with its attendant Legionella Risk from aerosolised water droplets. Gently wash off the Cartridge and then allow to dry. Hence the need for 2 sets of filter cartridges. NB: Do not use a pressure washer for this task and ensure that the power to the hot tub is turned off while the filter is removed from the hot tub. See also our topic ‘How to clean a hot tub filter’ in the ‘Filter care’ section of our website.

Top Tip: Given that it is necessary to allow a cleaned and rinsed filter to dry out before returning it to the hot tub, it is a good idea to buy a second set of spare filters so that whilst one set are being cleaned, rinsed, and dried, the second set can be in the hot tub filtering the water. This ensures that you do not have any downtime and you can still enjoy your hot tub whilst one set of filters are being cleaned. 

As with most things in life, a high quality item can prove to be a more cost effective solution by being more efficient and having a long service life. A high-quality Darlly filter with durable and efficient filter material provides you with the quality water filtration that you and your customers demand and deserve.   

Find out more information about complete hot tub care, including water care by following the links below.

British and Irish Spa and Hot Tub association

www.bishta.co.uk

The HSE guidelines for hot tubs

https://www.hse.gov.uk/pubns/books/hsg282.htm

Excerpt below is on P.22 of the above document.

Domestic-type spa pools – used as a business activity 

76 Domestic-type spa pools or hot tubs used as part of a business activity (eg in a holiday park rental unit or hotel bedroom(s) with their own dedicated spa, or as part of a rental agreement for a single family or group use) are subject to the general duties under the HSW Act. There is a legal requirement for these systems to be managed and controlled in proportion to the risk and the risk assessment should consider the type of pool and its use. Domestic-type spa pools are for use by a small, discrete group of people at any one time and are typically: 

– Of either a rigid or inflatable/foam-filled structure with freeboard and skimmer. 

– Systems where the water should be changed after each rental/week, whichever is the shorter. 

– Disinfected using bromine or chlorine through the use of an inline disinfectant feeder.  

Filtration 

95 Filtration is necessary to ensure adequate water clarity can be maintained through the removal of suspended particulate matter/debris in the water. Filtration is a means of entrapping particles mechanically and/or through absorption onto a filter medium. There are several types of system in common use and the choice of system type and size should reflect the anticipated type of use, circulation rate and bather load. Spa pools will typically only require one filtration system but multiple units and types in sequence may be appropriate, depending upon the local circumstances.

Cartridge filters – Cartridge filters are systems of tightly packed filter media such as fibreglass or paper in a demountable unit. They are small units and typically would only be used in domestic-type spa pools where the bather load and anticipated level of particulate matter was low. The design and installation should allow for removal of the cartridge for regular chemical cleaning, drying and periodic replacement. 

If you have any questions about our filters, please do not hesitate to get in contact, we’re always willing to help 

Happy Hot Tubbing!

The Darlly Team

When searching for replacement hot tub filters, if you do not have the part number of the quality Darlly filters required, use our quick-to-use comprehensive ‘Find your filter’ helper pages in our online catalogue. By using measurements and by matching the thread type pictures, you should be able to find the quality Darlly filter you and your hot tub deserve.

You can use the dimensions that you have to help get to the required filter. How do you measure a filter? Easy! Follow our easy-to-use guide below showing how to measure the relevant dimensions and identify the thread type, if any. All measurements are in cm.

How to measure External diameter for a filter

This is the measurement across the filter from edge to edge. This example is 12cm.

How to measure hot tub filter Length

Measure the length of the filter but do not include the handle or thread.

How to measure internal/Inside diameter for hot tub filter

Different hot tub filter Thread and fitting types (bottom of filter)

There are number of different types of fitting and thread types available. Filters can have male and female threads which can be coarse or fine, and possibly tapered.

Photo shows male threads, fine on the left hand side and coarse on the right hand side.

Measure the thread diameter. This is the inner edges of the hole of the male thread. For a female thread, measure the inner diameter.

The Fine Thread (MPT) has from 6 – 8 fine twists (Pleatco ends P4 or F2M) whereas the Coarse Thread (SAE) will have as little as only 3 thicker threads (Pleatco ends P3 or F2S). 

Hot Tub Filter Male thread diameter measurement

Hot Tub Filter Female thread diameter measurement

Tops-From left to right- open (Hole), closed top, handle, removable lid handle

Now identify the top of your filter. Match it against one of the four main types shown in the photo to identify the type of top. 

If you know the name of your hot tub manufacturer, this can help too.

Now that we have this information, we can now delve into the Darlly website or online brochure ‘Find Your Filter’ pages. Nearly there!

There are a couple of ways to find the filter you need now, both from the home page of our website Darlly.eu (Hover above the FILTERS  dropdown then select the type of filter you are searching for)

The ‘Find your filter’ helper is on the left hand side now. Scroll down here to select any relevant details to search for your filter. If this doesn’t find your exact filter, take a look inside our latest online brochure.

Open the latest filter brochure from the home page on the Darlly.eu website. Scroll down to the ‘Find Your Filter’ pages then search with the information you have to identify your filter. 

If you have your hot tub brand, you can use this to narrow the search.

The main identification chart will enable you to identify the exact filter you have using the top, bottom, length and diameter measurements of your existing filter.

If you also have the filter manufacturers part number, you can cross check this with the part numbers listed against the appropriate Darlly filter.

To find your local Darlly filter stockist, click on ‘Stockist’ on the homepage and either enter address or zoom in on the map.

All genuine Darlly filters have the part number printed on the end cap (eg “60401”)

Also the label on the wrapper will have all details. (Please keep safe this for your next filter change) Pleatco and Unicel will also sometimes have the part number on the end cap. Our brochure and website www.darlly.eu contain all of the part numbers to help you. 

However, should you be without any part number after following the identification guide above and using our ‘Find a Filter’ guide using your measurements and brand identities, simply call us on +44 (0)1952 – 580500 we would be delighted to help you. 

Happy Hot Tubbing! 

The Darlly Team

Our filters last a season. . . not a week. 

All of our inflatable filters are built with tri-lobal polyester media, that does not tear, does not fray and can be washed over and over. Darlly inflatable filters will last you for months not just a few days or weeks. Our research has found our inflatable filters will last four to five times longer than a normal inflatable filter. 

They can withstand the harsh environments of acid ( ph minus ) chlorine and bromine. 

Whatsmore, unlike the paper filters that come standard with your Intex, Lazy spa or Cleverspa the flow rates that are allowed to run through the filter means your jets will remain more powerful for longer. 

Due to the superior manufacturing process the pleats in your Darlly filter will not tear or bunch meaning chemicals in your inflatable spa will be far more effective and catching dirt, bacteria and oily substances will be done at an optimal level. 

At the end of the day you end up paying a lot less for clean, clear and fresh water in your hot tub, It makes so much sense. 

Happy Hot Tubbing!

The Darlly Team