🚚 Free Shipping on orders $100 or more!
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
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
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
Unicel® 4CH-935 – 35 Sq Ft Waterway Replacement Spa Filter Cartridge – part #4CH-935
Check Compatibility Before You Buy

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

Type: Filter

SKU: 4CH-935

Barcode: 678285240178

$68.29
$68.29
Shipping calculated at checkout.

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.

Frequently Bought Together
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

$68.29
$68.29

  • 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.

Key Features & Benefits

Frequently Asked Questions

FAQs coming soon! Stay Tuned!

Fast, Free Shipping

Orders over $100 ship free anywhere in the continental U.S.

Competitive Pricing

Premium products at prices that make sense and reasonable.

Authorized Reseller

100% genuine, factory-approved OEM — never aftermarket knockoffs.

Satisfaction Guaranteed

We stand behind every product with 30 days to return.