[Lifetime Warranty] 6CH-940 Spa Filter Replaces PWW50P3 Pleatco, Unicel, Filbur FC-0359, Aber 03FIL1400, Aladdin 14510, Waterway 817-0050 Front Access Skimmer, Viking Spa Hot Tub Filter, SAE Thread, 45 sq.ft
Two 6CH-940 spa filter replacements with 45 sq. ft. filtration area, handle top, and 1-1/2 inch SAE thread bottom.
6CH-940 spa filter dimension diagram showing 6-inch diameter, 7-5/8-inch length, and 1-1/2-inch SAE threaded bottom.
Comparison chart showing 6CH-940 spa filter SAE thread vs MPT thread to verify compatibility.
Infographic showing 6CH-940 spa filter trilobal fabric material structure for increased filtration efficiency.
6CH-940 spa filter infographic showing high dirt holding capacity and filtration efficiency for hot tub debris.
6CH-940 spa filter replacement with SAE thread shown on a compatibility information graphic.
Infographic showing 6CH-940 spa filter cleaning and maintenance instructions with a blue water background.
6CH-940 spa filter cartridge for clean pool water, shown with a family enjoying a swimming pool.
Two 6CH-940 spa filter replacements with 45 sq. ft. filtration area, handle top, and 1-1/2 inch SAE thread bottom.
6CH-940 spa filter dimension diagram showing 6-inch diameter, 7-5/8-inch length, and 1-1/2-inch SAE threaded bottom.
Comparison chart showing 6CH-940 spa filter SAE thread vs MPT thread to verify compatibility.
Infographic showing 6CH-940 spa filter trilobal fabric material structure for increased filtration efficiency.
6CH-940 spa filter infographic showing high dirt holding capacity and filtration efficiency for hot tub debris.
6CH-940 spa filter replacement with SAE thread shown on a compatibility information graphic.
Infographic showing 6CH-940 spa filter cleaning and maintenance instructions with a blue water background.
6CH-940 spa filter cartridge for clean pool water, shown with a family enjoying a swimming pool.
Lifetime Warranty

[Lifetime Warranty] 6CH-940 Spa Filter Replaces PWW50P3 Pleatco, Unicel, Filbur FC-0359, Aber 03FIL1400, Aladdin 14510, Waterway 817-0050 Front Access Skimmer, Viking Spa Hot Tub Filter, SAE Thread, 45 sq.ft

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6CH-940 Pool & Spa Filter

Key Features

  • Filtration Area: 45 sq. ft.
  • Media: Spun-bonded polyester pleated fabric
  • Media property: Inhibits the growth of bacteria and mold
  • Outside Diameter: 6 inches
  • Length: 8 1/4 inches
  • Top: Closed with handle
  • Bottom: 1 1/2 inch SAE threaded connection

Replaces / Cross-Reference Part Numbers

  • Unicel: 6CH-940
  • Pleatco: PWW50P3
  • Filbur: FC-0359
  • Waterway: 817-0050
  • Master Spa: X265010
  • Other: 60401, PWW50, 03FIL1400, 25252, 378902

Compatibility & Fitment

Designed for use in spas and hot tubs from manufacturers including Waterway, Vita Spas, and Master Spas. Always verify dimensions against your existing filter cartridge before ordering.

When to Replace

  • Water flow from jets is noticeably reduced.
  • Pressure gauge on the filter system reads 8-10 PSI higher than its clean starting pressure.
  • Cartridge pleats are collapsed, frayed, or damaged.
  • End caps are cracked or brittle.
  • The filter requires excessively frequent cleaning.

Installation Tips

  1. Turn off all power to the spa pump.
  2. Unscrew the filter housing lid and remove the old filter cartridge.
  3. Clean any debris from the housing and threads.
  4. Insert the new 6CH-940 filter and thread it into place.
  5. Hand-tighten only; do not over-tighten.
  6. Replace the housing lid and restore power to the pump.
  7. Bleed any trapped air from the system using the air relief valve.
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  • WIDE COMPATIBILITY

    WIDE COMPATIBILITY

    This part replaces Unicel 6CH-940, Pleatco PWW50P3 (NOT PWW50P4), Filbur FC-0359, Aber 03FIL1400 and more.
  • UPGRADED MATERIAL

    UPGRADED MATERIAL

    Our product features trilobal fabric material which can capture dirt, sand, hair and other debris to maintain clean water.
  • BEST SOLUTION

    BEST SOLUTION

    Experience the wonderful feeling of swimming in a clean pool - BlueStars brings DIY solutions to help you deal with any trouble.
  • SIMPLE INSTALLATION

    SIMPLE INSTALLATION

    Have a clean pool in just 15 minutes of replacement!
Brand Model Number
1. Gauge the cartridge's external diameter, ensuring accuracy to within +/- 1/16 inch.
2. Measure the cartridge's length from one end cap to the other, excluding any protruding handles or extensions, to within +/- 1/16 inch.
3. Determine the top and bottom type. If they're open, measure the inner diameter of the opening to within +/- 1/16 inch. For closed end caps, jot down distinct features (e.g., "Handle", "Cone").
4. Note down the filter's manufacturer and model number where the new cartridge will be placed.
5. Check if there's a central core (like a PP pipe) present.

FAQ

This filter is commonly cross-referenced to Unicel 6CH-940, Pleatco PWW50P3, Filbur FC-0359, Aber 03FIL1400, Aladdin 14510, and Waterway 817-0050. Additional cross references found for this filter family include 25252, 378902, 6CH-940RA, PWW50P3-M, FC-0359M, HTF0245RT, 60401, 60401M, AK-9019, XLS-601, SC714, WY45, P6CH-940, PC-0359, FC9941M, AKU1609, APCC7144, FL1007, PMA-R4, X265010, X268549, 10-1085, 14150, 4510, 4900-301, 4902-076, 822070, UNI6CH-940, PLE-051-9193, PLE-051-9194, 78902, SD-00031, and SD-00710.
It is designed for the 6CH-940 / PWW50P3 / FC-0359 filter family used in certain spa and hot tub systems, including Waterway front access skimmer setups and some Viking Spa applications. Compatibility is typically matched by the exact filter number and the threaded bottom style. Important: this style is commonly listed as fitting Pleatco PWW50P3, Unicel 6CH-940, Filbur FC-0359, Aber 03FIL1400, Aladdin 14510, Waterway 817-0050, and related equivalents. It is often specifically noted as NOT interchangeable with PWW50P4, so verify your old filter number before ordering.
This filter uses an SAE threaded bottom connection, commonly described for this family as a 1-1/2 inch coarse SAE thread. The thread type matters because two filters can look very similar but still not install correctly if the thread pitch or style is different. If your current cartridge screws into the skimmer or filter well, match the exact part number and thread style rather than relying only on diameter or filter area.
Common signs include weak jet pressure, cloudy water, poor circulation, repeated dirty-filter warnings, short filter cleaning intervals, or a cartridge that stays discolored and restrictive even after cleaning. If the pleats are collapsed, frayed, split, or the end caps or threaded connection are damaged, the filter should be replaced rather than cleaned again.
Installation is usually simple and takes about 5 to 10 minutes. Turn off power to the spa, open the filter compartment or front access skimmer, unscrew the old cartridge, clean debris from the housing and threads, then screw in the new filter by hand. Do not overtighten. No special tools are normally required unless your access cover uses screws or latches.
The most common causes are heavy bather load, body oils, lotions, scale buildup, poor water balance, and fine debris loading the pleats. In spas, filters also clog faster when sanitization is inconsistent or when the cartridge is cleaned with improper chemicals that damage the media. If a new filter gets dirty unusually fast, check sanitizer levels, calcium hardness, and whether the spa needs a deeper plumbing purge or water change.
Confirm the exact number from your old cartridge, especially PWW50P3 versus PWW50P4. Also inspect the filter well or skimmer threads for cracks or cross-threading, remove any trapped debris in the suction area, and make sure the old gasket material or dirt is not preventing the new filter from seating properly. If water flow was poor before replacement, also inspect the pump basket area, suction fittings, and circulation path for blockage.