Catalina Spas Filters
The Catalina Spas filter we carry is the 45 sq ft outside thread cartridge (6CH-940). Pull your filter, measure it and match it to the card below — every brand and pack size is on its page.
Your Catalina Spas filter
Not sure? Measure the diameter across the end cap, the length end to end, and check the top and bottom — open, handle, threaded or slip fit. Or send a photo of your filter through the form below and we will confirm the fit.
Shop: All Hot Tub Filters | Ego3 Reusable Filters
Resources: Compare Filter Brands | Water Care
Showing all 3 resultsSorted by price: high to low
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Catalina Spas Filters
Catalina Spas Filter – 45 Sq Ft Outside Thread – Single – ProAqua Antimicrobial – High Flow
$64.99 Add to cart -
Catalina Spas Filters
Catalina Spas Filter – 45 Sq Ft Outside Thread – EZ11 – Single – Darlly
$61.99 Add to cart -
Catalina Spas Filters
Catalina Spas Filter – 45 Sq Ft Outside Thread – EZ11 – Single – Hurricane – Made in USA
$48.99 Add to cart
✅ Not Sure It Fits? Verify Before Ordering
Hot tub filter fitment varies by spa brand, model, year, filter size, thread style and top/bottom style.
To confirm the correct replacement, send clear photos of:
- The label or end cap of your current filter
- Your spa serial number sticker
- The filter well with the filter removed (so we can see the fitting)
EZ Hot Tub Parts confirms fitment before you order, so you do not pay return freight on a wrong filter.
Catalina Spas filter buying guide
45 sq ft outside thread — 6CH-940. 6″ across, 7-5/8″ long, handle top, 1-1/2″ male SAE (coarse) thread bottom. Fits Catalina Spas models with the 1-1/2″ coarse-thread skimmer filter. Options: Hurricane, ProAqua antimicrobial, Darlly. Singles, 2 packs and 4 packs are available.
Use the buttons on each filter page to switch brand or pack size.
Not sure which filter brand is right for you? Compare Hurricane, OEM Factory Direct, Pleatco, ProAqua, Darlly and Ego3.
Keep your filters working longer: High Pressure Filter Nozzle | Filter Cleaner | Water Care — and every order over $99 ships free, so a spare set plus cleaner usually rides along at no extra cost.
Catalina Spas filters: 45 sq ft Outside Thread (Hurricane)
Catalina Spas filter questions
The Catalina Spas filter we list is the 45 sq ft outside thread (6CH-940); some models may use a different cartridge. Measure your old filter and match the size and the bottom style, or send us a photo.
Measure the diameter across the end cap and the length end to end, then look at the bottom: open, threaded (outside or inside) or slip fit. The filter specs on each product page list all four.
Yes. Pleatco PWW50P3 and Unicel 6CH-940 are the same 45 sq ft cartridge from two different makers; the cross-reference list on each product page shows the other equivalent numbers.
Every 12 months, with a rinse every 2–4 weeks and a monthly soak in filter cleaner. Keeping a second filter to rotate makes both last longer.