Sunbelt Spas Filters
Sunbelt Spas hot tubs use one of two filters. Pull your filter, measure it and match it to the cards below — every brand and pack size is on its page. Both are 6″ × 8-1/4″; the bottom tells them apart — threaded or slip fit.
Your Sunbelt Spas filter, by cartridge
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 4 resultsSorted by price: high to low
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Hot Tub Filters
Sunbelt Spas Filter – 45 Sq Ft Outside Thread – Single – ProAqua – High Flow
$59.99 Add to cart -
Hot Tub Filters
Sunbelt Spas Filter – 45 Sq Ft Slip Fit Bottom – Single – ProAqua – High Flow
$58.99 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.
Sunbelt Spas filter buying guide
45 sq ft outside thread — 6CH-942. 6″ across, 8-1/4″ long, open top, male SAE thread bottom. Fits select Sunbelt Spas models that use the 45 sq ft outside thread cartridge. Options: ProAqua, Darlly. Singles, 2 packs and 4 packs are available.
45 sq ft slip fit bottom — 6CH-941. 6″ across, 8-1/4″ long, handle top, male slip fitting bottom. Fits select Sunbelt Spas models that use the 45 sq ft slip fit bottom cartridge. Options: ProAqua, 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.
Sunbelt Spas filters: 45 sq ft Outside Thread (ProAqua) | 45 sq ft Slip Fit Bottom (ProAqua)
Sunbelt Spas filter questions
Depending on the model, Sunbelt Spas hot tubs use the 45 sq ft outside thread (6CH-942) or the 45 sq ft slip fit bottom (6CH-941). 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 PWW100ST-P3 and Unicel 6CH-941 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.