Product Overview

The Pentair Triton C-3 Commercial Sand Filter delivers high-capacity filtration for commercial swimming pools and properly engineered large residential installations. Its fiberglass-reinforced tank houses a multi-diffuser system that distributes water across the sand bed for consistent debris capture. With substantial filtration area and large flanged connections, it supports demanding circulation requirements using sand rather than cartridge elements. Pool Supply Depot offers this black, side-mount filter for contractors, facility operators, and owner-builders planning professionally sized filtration systems.

Ideal For

Commercial pool filtration projects, large residential equipment upgrades, and professionally engineered tandem installations requiring multiple filters. Suitable applications include hotel, community, and recreation pools when system sizing supports the facility’s requirements.

Key Features

• Multi-diffuser design promotes even water distribution across the sand bed.
• One-piece fiberglass-reinforced tank provides strength and resistance to demanding pool-equipment environments.
• Standard 3-inch flanged connections accommodate higher-flow commercial plumbing.
• An 8-inch tank opening and 2-inch drain provide access for media servicing and drainage.

Benefits

• Consistent sand-bed loading supports longer filtration cycles between cleanings.
• Backwashing removes collected debris without routine cartridge removal.
• Tandem installation capability supports professionally designed multi-filter systems.

Compatibility

Confirm pump output, flange configuration, backwash requirements, and available installation space. This is not a universal replacement for filters with 2-inch threaded connections. Actual operating flow must match the complete circulation system’s design.

Installation or Upgrade Context

Pentair requires installation by a qualified professional. Provide a suitable permanent mounting surface and maintenance clearance. Never open or adjust the filter closure while the system is pressurized.

What’s Included

Filter assembly without a control/backwash valve. Confirm the required valve or manifold arrangement, filtration media, pump, and installation plumbing with your installer before ordering.

Specifications

Customer Q&A

Is the backwash valve included?
No. The correct valve or manifold must be selected separately for the filter’s 3-inch flanged connections and your circulation system.

Why are both 106 GPM and 141 GPM listed?
They represent different filtration rates. Your project’s design determines the appropriate operating flow; the maximum rating is not automatically the recommended flow.

What type of sand does it use?
Pentair specifies No. 20 standard silica filter sand. Your installer must also maintain the specified media depth and freeboard, rather than relying on weight alone.

When should it be backwashed?
Follow Pentair’s guidance: a 30% flow reduction from the clean baseline, or a 10 PSI pressure increase when no flow meter is installed. Avoid backwashing solely on a calendar schedule.