1 1/4" (32Mm) Ballvalve Diaphragm Washer

1 1/4" (32Mm) Ballvalve Diaphragm Washer

The 1 1/4" (32mm) Ballvalve Diaphragm Washer is a high-quality replacement rubber seal designed for large-bore float valves, typically found in commercial cold water storage tanks, header tanks, and industrial cisterns. This diaphragm is the critical component that shuts off the water flow when the float reaches the required level; over time, these washers can perish, harden, or tear, leading to "trickling" overflows or a failure to shut off entirely.

Key Features and Specifications

Size: 1 1/4" (32mm) diameter – specifically for high-flow, large-aperture ballvalves.

Material: Manufactured from heavy-duty, reinforced EPDM rubber for excellent durability and resistance to water pressure.

Compatibility: Designed to fit most standard 1 1/4" equilibrium and high-pressure float valves (e.g., Part 1 or Part 2 style commercial valves).

Reinforced Center: Features a toughened central section to withstand the constant impact of the valve plunger without "holing."

Pressure Rated: Suitable for both high and low-pressure systems, providing a watertight seal against mains water pressure.

Common Symptoms of Failure

Constant Overflow: Water continuing to run into the tank even when the float is fully raised.

Vibration/Noisy Shut-off: A "shuddering" sound as the tank nears full, often caused by a warped or hardened diaphragm.

Slow Leaks: Water weeping from the valve body rather than the nozzle.

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Specialist Support and Local Collection

Maintaining a large commercial tank or a block of flats? We stock a full range of ballvalve washers, diaphragms, and complete float valve assemblies for immediate trade use.

Visit our trade counter at 61 Fullers Road, E18 2QB for expert advice and to browse our extensive inventory of plumbing maintenance spares and genuine boiler parts.