2 Pack of replacement Marquis Spas filters (50 sq ft closed top drop-in) — Pleatco
Fits Marquis Spas models with the closed-top 50 sq ft filter (14-1/8″ long). Match the diameter, length, and top and bottom style below to the filter you are replacing — if the numbers match, it fits.
Genuine Pleatco Advanced spa cartridge: point-bonded filtration fabric with a high volume of fine fibers for better flow and more dirt-holding capacity, on Pleatco’s Free Flow core that lets water reach more of the fabric at lower operating pressure.
In stock — orders processed same day or next business day. These filters should last 6 months when used with a filter cleaner.
Not sure which filter brand is right for you? Compare hot tub filter brands here.
Did you know the number one reason for hot tub freeze damage is a dirty filter? Dirty filters also cause additional stress on the pump/motor and leads to premature failure.
Proper Filter Care System:
- Have 2 sets of filters
- Install clean filter
- Rinse dirty filter with high pressure nozzle
- Verify no debris left between pleats, before storing on shelf to dry
- Once a month soak filters in a filter cleaner solution
Filter Specs:
- Diameter – 5-3/16″
- Length – 14-1/8″
- Top: Closed
- Bottom: Open, 1-5/8″ hole
- SQFT: 50
What’s in the box: two Pleatco filter cartridges.
✅ Not Sure It Fits? Verify Before Ordering
Hot tub part compatibility can vary by spa brand, model, year, serial number, control system, and part revision.
To help us identify the correct replacement part, please send clear photos of:
- Your existing part label or sticker
- Your spa serial number sticker
- The equipment area or installation location (if accessible)
EZ Hot Tub Parts can help confirm fitment before you order and help reduce costly returns.
It fits Marquis Spas models with the closed-top 50 sq ft filter (14-1/8″ long). Measure your old filter end to end and across the end cap — this cartridge is 5-3/16″ across and 14-1/8″ long with a closed top and open, 1-5/8″ hole bottom. If the numbers match, it fits. Not sure? Send a photo through the form above.
This cartridge cross-references to: Pleatco PPM50TC, Unicel C-5346, Filbur FC-3638, Marquis 370217 / 37-0217, ProAqua PA-1546.
Yes — we stock this Pleatco filter in Minnesota and ship orders the same or next business day. Orders over $99 ship free in the lower 48.
Yes — genuine Pleatco Advanced spa cartridge with point-bonded fabric and the Free Flow core, not an aftermarket copy.
Rinse it every 2–4 weeks, deep-clean it monthly with filter cleaner, and replace it every 12–24 months or sooner if the pleats are torn, flattened, or the end caps are cracked. Keeping a second set to rotate makes both sets last longer.
PPM50TC Pleatco PPM50TC Unicel C-5346 Filbur FC-3638 Marquis 370217 / 37-0217 ProAqua PA-1546
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