Unicel 5CH-35 Hot Tub Filter Cartridge – 35 Sq Ft | Replaces PMAX50P4

Keep your hot tub water clean and clear with the Unicel 5CH-35 Replacement Spa Filter Cartridge, a premium, American-made filter designed for select MAAX, Elite, Vita, and other compatible hot tubs.

Featuring 35 square feet of filtration media, 203 pleats, and durable Reemay 2033 polyester fabric, the Unicel 5CH-35 effectively captures dirt, debris, body oils, and other contaminants while maintaining proper water circulation.

This replacement cartridge features a convenient semi-circular top handle and a 1-1/2-inch male threaded bottom connection for easy installation and removal.

Features

• Genuine Unicel replacement spa filter cartridge

• Made in the USA

• 35 square feet of filtration surface

• Premium 3 oz Reemay 2033 polyester filtration media

• 203 pleats for effective dirt and debris capture

• Durable construction designed for repeated cleaning

• Semi-circular top handle for easy removal

• 1-1/2-inch male threaded bottom connection

• Designed to meet OEM filtration specifications

• Replaces Pleatco PMAX50P4 and Filbur FC-0300

Hot Tub and Spa Compatibility

The Unicel 5CH-35 is commonly used in select hot tubs and spas manufactured under the following brands:

• Elite Spas by MAAX

• MAAX Spas

• MAAX Spas of Arizona

• MAAX Spas of Canada

• Vita Spas

• Hydro Spa

• Monarch Spas

• Sunbelt Spas

• Select Costco-sold spas

Compatibility varies by model and production year. These manufacturers have used different filter cartridges across their product lines.

Important: Always confirm the dimensions, bottom thread type, and existing filter part number before ordering. Brand compatibility alone does not guarantee fit.

Replacement Filter Part Numbers

Unicel: 5CH-35

Pleatco: PMAX50P4, PAS35P4

Filbur: FC-0300

Darlly: 50353

ProAqua: PA-535

Other References: 104309, 6136, OC5-35, PA-AP50353, EL35M, 5TH-35

Specifications

Brand: Unicel

Part Number: 5CH-35

Product Type: Hot Tub and Spa Replacement Filter Cartridge

Filtration Area: 35 Sq Ft

Outside Diameter: 5-5/8 inches (143 mm)

Filter Length: 8 inches (203 mm)

Top End Cap: Semi-Circular Handle

Bottom End Cap: 1-1/2-inch Male Thread (MPT)

Pleat Count: 203

Filter Media: Reemay 2033 Polyester

Media Weight: 3 oz

Country of Manufacture: USA

How to Confirm the Correct Filter

Before purchasing, remove your existing spa filter and verify the following measurements:

Diameter: Approximately 5-5/8 inches across the filter body.

Length: Approximately 8 inches, excluding the handle and threaded connection.

Top: Closed end cap with a semi-circular handle.

Bottom: 1-1/2-inch male pipe thread (MPT).

The 5CH-35 uses an MPT connection. Filters with different thread types or connection sizes may not fit, even if their overall dimensions are similar.

Frequently Asked Questions

Does the Unicel 5CH-35 replace the Pleatco PMAX50P4?

Yes. The Unicel 5CH-35 is a listed replacement for the Pleatco PMAX50P4 and Filbur FC-0300 filter cartridges.

Will this filter fit my MAAX or Elite hot tub?

The 5CH-35 is used in select MAAX and Elite Spas models. Confirm your existing filter dimensions and threaded connection before ordering.

Does the Unicel 5CH-35 fit Vita Spas?

Some replacement-filter suppliers list Vita Spas among compatible brands. However, Vita Spa uses multiple filter sizes, so the original cartridge number and measurements must be verified.

Is the Unicel 5CH-35 made in the USA?

Yes. Unicel 5CH-35 filters are manufactured in the USA using quality polyester filtration media.

How often should I clean my spa filter?

Rinse the cartridge regularly to remove debris and buildup. Cleaning frequency depends on spa usage, water conditions, and manufacturer recommendations.

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Unicel 5CH-35 Spa Filter | MAAX Elite | PMAX50P4

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Shop Unicel 5CH-35 hot tub filter, 35 sq ft, 5-5/8" x 8", 1-1/2" MPT. Fits select MAAX and Elite spas. Replaces PMAX50P4 and FC-0300. Made in USA.

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