Wilkins 153n O-ring Check Cover 1.25-2 in 950 975

Product Description

The WILKINS 153n is a replacement O-ring check cover designed for use in backflow prevention assemblies. This repair part provides a sealing interface for the check valve module within the assembly, maintaining pressure integrity and preventing contaminant backflow into potable water supply lines. The 153n fits valve bodies in the 1.25 inch to 2 inch size range and is used during routine maintenance or when a damaged cover compromises check valve performance. Licensed plumbers and backflow prevention specialists are the primary installers of this component.

This check cover is a direct-fit repair part for WILKINS 950 and 975 series backflow preventers in the 1.25 inch through 2 inch size range. These assemblies are commonly installed in commercial and light industrial plumbing systems where backflow protection is required by local codes. The 153n is typically replaced during annual test-and-inspect cycles or whenever the O-ring seal shows signs of wear, cracking, or deformation that causes leakage around the check module.

Key Features

• Fits 1.25 inch to 2 inch WILKINS 950 and 975 series backflow preventers
• O-ring check cover design maintains a reliable seal at the check valve chamber
• OEM repair part for field service and annual maintenance rebuilds
• Sized for mid-range commercial backflow preventer valve bodies

Compatibility

Designed for use with WILKINS 950 and 975 series backflow preventer assemblies in the 1.25 inch to 2 inch valve size range.

Installation Notes

Installation should be performed by a licensed plumber or certified backflow prevention tester in accordance with local plumbing codes and the applicable requirements of the IPC or IAPMO standards. Shut off the upstream water supply and relieve system pressure before disassembling the backflow preventer. Inspect the mating seating surface for debris or damage before installing the replacement cover. Do not overtighten; follow the assembly torque guidance provided in the WILKINS service manual for this series.

Technical Specifications

• Compatible Valve Size: 1.25 inches to 2 inches
• Compatible Series: 950, 975
• Component Type: O-Ring Check Cover

Standard Information

• Brand: WILKINS
• Manufacturer Part Number: 153n