Alford & Lynch Hot Tub & Spa Filters

Welcome to Alford & Lynch! Our company was founded upon our passionate drive to bring the best filters at the best prices to our customers.

In a world where costs are constantly being driven up and up, we’re all trying to save as much as we can. It can be difficult to do that when you’re a hot tub, spa or swimming pool owner – between replacement filters, cartridge maintenance, and upkeep, and unforeseen repairs, bills can rack up.

That’s why here at Alford & Lynch, we’ve dedicated ourselves to ensuring that our customers don’t have to pay high prices for branded filters. Each one of our filters is an exact match for all main-brand hot tub filters, pool filters, spa filters and more. In addition, we’ve fostered personal and close working relationships with the top manufacturers in the game: so that you can get superior filters for a fraction of their brand prices.

Cross Reference Chart

Now that you’re a little more familiar with what we do here at Alford & Lynch – where do you start with finding the perfect hardware for you?

We’ve made it as straightforward as possible. Just find the branded filter you currently use in our cross-reference chart, and follow the guideline to see its corresponding Alford & Lynch filter. It’s pool filter, spa filter and hot tub filter replacement made easy!

Choose your filter model in the table below:

Alford & Lynch Unicel Filbur Pleatco Pentair Waterway Darlly
AL0902 C-4326 FC-2375 PRB25-IN


R173428 817-2500 SC704 42513
AL1509 C-4950 FC-2390 PRB50-IN R173434 817-5000 SC706 40506
AL0901 C-6430 FC-3915 PWK30 SC712 60301
AL1806 C-4335 FC-2385 PRB35-IN 17-2482


Plastics 817-3501
AL0701 6CH-940










PWW50P3-EP1 X268045

PDY50P3 / PDY50P3-M






Front Access Skimmer 50 SF


SC714 60401
AL0506 4CH-949 FC-0172 PWW50L 817-4050 SC757 40508
AL2811 C-8465 FC-3960 PWK65 SC713 80651

All Pool & Spa Filter Brands

We have worked hard to ensure that no matter which named brand you use for your pool, spa or hot tub filter needs, we have the perfect match for you.

We cover all the industry headliners, such as:

… so you can be sure that we have a replacement to fit your needs!

In addition, thanks to our prime location in Ireland (and thus our connections to the European Union and existing outside of Brexit), delivery and custom costs are as low as possible for you. We’ve covered every angle, so that you can feel confident that you’re receiving the best pool, spa or hot tub filter experience possible.

Spa Filter Cartridges

Let’s imagine: you’ve decided to start off your weekend in style. You’ve had a long day, so you kick back, and relax in your spa or hot tub, until… you realise your hot tub filters are broken and need replacements. It’s one of the most frustrating things!

At Alford & Lynch, we’ve committed ourselves to making sure that the hot tub filter changing process can be as stress-free for you as possible. Our brand-corresponding filters are made with high density micro membrane fabric, adhere to all safety standards, and are sturdy and resilient. That means that as well as saving you the cost of expensive branded filters, you’ve also guaranteed that your hot tub filters can withstand the test of time: no need for constant, pricey replacements!

Can I Run My Spa Without A Filter?

While it is physically possible to run your spa, swimming pool or hot tub without a filter, we don’t recommend it.

A spa, pool or hot tub filter’s purpose is to filter out any debri and dirt from your equipment’s water, before it can have the chance to infiltrate the pumps and cause clogging damage and poor water quality. If you run your equipment for an extended period of time without a filter in place, debri and dirt will build up and could cause serious damage to your pumps, piping and water hygiene.

Alford & Lynch’s pool, spa and hot tub filters are efficient, effective and well-priced: so by obtaining a filter now, you save money on costly repairs in the long run.

How Long Do Hot Tub Cartridge Filters Last?

We highly recommend that you clean your hot tub filters regularly, to ensure their lifespan lasts as long as possible. As a rule of thumb, you should aim to rinse your spa filter weekly, and deep clean it using a cleansing solution at least every month.
Even with these precautions though, hot tub filters do need to be replaced annually. This is to ensure that they keep working at peak performance, and that you don’t have to worry about filter degradation or poor water quality.
If you have any questions or if you’re unsure of your own filter’s lifespan, don’t hesitate to reach out to us.

How Do I Find The Correct Filter For My Hot Tub?

Trying to find the correct hot tub filter can be daunting, but we’re here to make it as easy as possible. Some hot tub manufacturers stamp the filter/part number onto the filter itself, which means you just need to search for that particular stamp code/filter identifier. In other cases, manufacturers don’t do this, and you may need to measure the hot tub filter and then identify one that fits those measurements.

It sounds like a lot of work, but it doesn’t have to be! Our cross-reference chart shows you all of the most common filters, and the product specifications of each. Of course, it also shows you the superior, cheaper Alford & Lynch alternative: just follow the guide, and order today!

How Do I Know What Size Filter Cartridge I Need?

If you do not have your user manual or if your filter does not come with specifications stamped/outlined, you may have to manually measure it.
To do this, utilise a ruler or measuring tape.

  • Measure the hot tub filter length, from top cap to bottom cap – not including any attachment points or threads
  • Measure the inside diameters of both the top and end cap
  • Measure the outside diameter of the end cap
  • Search these measurements on our site, and the results shown will be for filters with the specifications you need

If you have any questions or if you’d like some help with the process, reach out to us today. It’s our Alford & Lynch mission to provide you with the best hot tub filter possible – and support you in the process from start to finish!

All Spa & Hot Tub Filters

Replacement Filter for Unicel-c-8465, Pleatco pwk65, Filbur fc-3960, Tiger River 31114, 71827, 71828
Sold out

Replacement Filter for Tiger River 31114, 71827, 71828

Replacement Filter for Unicel-c-8465, Pleatco pwk65, Filbur fc-3960,
$ 29.95$ 80.99
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