Unicel® 4CH-935 – 35 Sq Ft Waterway Replacement Spa Filter Cartridge – part #4CH-935

$46.50
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Unicel® 4CH-935 – 35 Sq Ft Waterway Replacement Spa Filter Cartridge – part #4CH-935

Unicel® 4CH-935 – 35 Sq Ft Waterway Replacement Spa Filter Cartridge – part #4CH-935

$46.50
Description
The Unicel® 4CH-935 replacement filter cartridge is designed for Waterway brand hot tubs and other spa systems using a 35 sq ft filter. Made with premium Reemay® media, this durable filter provides superior water clarity, dirt-holding capacity, and resistance to degradation. Its 2" MPT threaded bottom fitting ensures a secure connection, while the compact 4-5/8" diameter makes it ideal for space-efficient spa designs. Regular replacement of your filter helps prolong spa equipment life and maintain clean, safe water.

Product Description

  • Premium replacement filter cartridge for Waterway spas and other compatible systems requiring a 35 square foot cartridge.

  • Features high-quality Reemay® polyester media that traps dirt and debris while maintaining excellent flow.

  • Designed with a closed top and 2" male pipe thread (MPT) bottom fitting for easy installation and secure fit.

  • 4-5/8" outer diameter and 10-1/2" length allow compatibility with compact spa filtration systems.

  • Offers long-lasting filtration performance and durability under regular spa use.

  • Helps protect spa pumps and jets from clogging and extends the life of your water care system.

  • Simple to rinse and reuse between cycles; recommended replacement every 12 months or as needed.

  • Manufactured by Unicel®, a trusted name in pool and spa filtration.

Product Specification

Brand Unicel
SKU 4CH-935
Dimensions 4.8 x 9.84 x 4.76 in
Barcode 678285240178
Weight 1.21 lb

Product Compatibility

  • 2014 - 2024 Nordic Hot Tubs™ Crown
  • 2010 - 2024 Nordic Hot Tubs™ D'Amour MS
  • 2008 - 2024 Nordic Hot Tubs™ Encore
  • 2010 - 2024 Nordic Hot Tubs™ 110 D'Amour
  • 2010 - 2024 Nordic Hot Tubs™ D'Amour SE
  • 2008 - 2024 Nordic Hot Tubs™ Jubilee
  • 2008 - 2024 Nordic Hot Tubs™ Stella

FAQ

Q: How often should I replace this filter?

A: Every 12 months or as needed based on spa usage and water quality.

Q: Is this compatible with all Waterway spas?

A: It fits many Waterway models, but always confirm measurements and fittings match your current filter.

Q: Can I clean and reuse this filter?

A: Yes, rinse every 1–2 weeks and deep clean monthly for best performance.

Q: What is the fitting size on the bottom?

A: It features a 2" MPT (Male Pipe Thread) bottom connection.

Q: What material is used in this filter?

A: Made with premium Reemay® polyester media for high durability and performance.

Directions

Turn off spa power and open the filter compartment.

Unscrew and remove the old filter cartridge.

Rinse new 4CH-935 cartridge thoroughly with a hose before installation.

Insert and thread the new cartridge into the filter housing securely.

Restart the spa and check for proper water flow and filter engagement.

Customer Reviews

Based on 177 reviews
48%
(85)
52%
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Q
Quinn J.
Highly recommend

I had no trouble replacing the old part. Great product and even better support.

C
Chris N.
Five stars

Outstanding quality and fast shipping. This product exceeded all expectations.

D
Dani M.
Perfect fit

Can’t believe I didn’t replace this sooner. Total game-changer for my spa.

S
Skylar K.
Great quality!

Exactly what I needed. It works better than the original part that came with the spa.

A
Avery B.
Good value

I had no trouble replacing the old part. Great product and even better support.

123

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