Larsen Supply Co. 1933321 Fill Valve Top Assembly

Product Description

The LARSEN SUPPLY CO., INC. 1933321 is a fill valve top assembly designed as a direct service component for Coast Master 1B1 fill valves used in toilet tank plumbing systems. This assembly replaces the top portion of the fill valve, restoring proper float and shut-off operation without requiring full valve replacement. It ships with the necessary mounting screws included, making it a practical repair option for licensed plumbers and experienced service techs working on residential or light commercial fixtures. The unit is sold individually and arrives carded for easy point-of-use identification.

This part is suited for repair and maintenance work on toilets equipped with Coast Master 1B1 fill valves. It is a targeted fix for situations where the valve body itself is intact but the top assembly has worn, cracked, or failed to seat properly, causing continuous running or improper tank refill. Plumbing contractors and service professionals stocking common repair components will find this a useful item to carry for toilet valve service calls.

Key Features

• Replacement top assembly specifically engineered for Coast Master 1B1 fill valves
• Includes mounting screws for complete installation readiness
• Sold individually, packaged carded for retail or service van inventory
• Restores proper fill and shut-off function without full valve replacement

Compatibility

Designed for use with Coast Master 1B1 fill valves as a direct top assembly replacement component.

Installation Notes

Installation is typically performed by a licensed plumber. Shut off the water supply at the fixture stop valve and flush the tank to drain residual water before beginning disassembly. Remove the existing top assembly per the valve manufacturer's service procedure and install the replacement using the included screws. Verify the float and shut-off mechanism operate correctly and check for leaks before returning the fixture to service.