American Whirlpool Filters
American Whirlpool hot tubs use one cartridge: the 75 sq ft slip-fit filter (EZ18), 8″ across and 13″ long with a smooth male slip fitting on the bottom instead of a thread. It is the same cartridge Maax and Vita spas use.
The American Whirlpool filter
One cartridge covers the line; if your filter measures anything other than 8″ across, send a photo through the form below.
Shop: All Hot Tub Filters | American Whirlpool Parts | Ego3 Reusable Filters
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American Whirlpool Filters
American Whirlpool Filter – 75 Sq Ft Slip Fit Bottom – EZ18 – Single – Darlly
$109.99 Add to cart -
American Whirlpool Filters
American Whirlpool Filter – Proline – EZ18 – High Flow
$74.99 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.
American Whirlpool filter buying guide
Slip-fit 75 sq ft (EZ18). 8″ diameter, 13″ long, 2″ male slip fitting (Unicel C-8475, Pleatco PMA45-2004 class, Waterway 817-0075). Stocked here in ProAqua; the identical cartridge is also listed under Vita Spas in ProAqua and Darlly. Push it straight onto the fitting — no threads to strip.
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.
Confirm your American Whirlpool filter: Slip-Fit EZ18 (ProAqua) | Slip-Fit EZ18 (Darlly)
American Whirlpool filter questions
The 75 sq ft slip-fit cartridge, our EZ18: 8″ across, 13″ long, with a 2″ male slip fitting on the bottom (Unicel C-8475). It pushes onto the fitting in the well.
Yes — American Whirlpool, Maax and Vita share the C-8475 slip-fit cartridge. Any of our EZ18 listings fits.
About once a year with monthly cleaning; keep a second EZ18 to rotate so one is always dry.