Description
Watts 0889373 RK957 2.5–4″ Rubber Parts Kit Overview
The Watts 0889373 is a genuine OEM rubber parts kit designed specifically for the Watts Series 957 reduced pressure zone (RPZ) backflow preventer in 2.5″ through 4″ sizes. Keeping your backflow preventer properly maintained with authentic replacement rubber components ensures reliable protection of potable water supplies and helps you pass annual inspection requirements with confidence.
Key Features
- Genuine Watts OEM replacement rubber components for accurate fit and function
- Compatible with Watts Series 957 reduced pressure zone backflow preventers
- Covers 2.5″, 3″, and 4″ valve sizes
- Restores check valve seats, O-rings, and elastomeric seals to like-new condition
- Helps maintain compliance with local water authority backflow testing and inspection requirements
- Extends the service life of existing Series 957 assemblies, reducing total cost of ownership
- Simplifies field maintenance — no need to replace the entire valve body
Application
The RK957 rubber parts kit is ideal for commercial plumbing, mechanical, and HVAC hydronic systems where the Watts 957 RPZ assembly is installed to protect against backflow contamination. Use during scheduled annual maintenance, after a failed backflow test, or any time internal rubber components show signs of wear, deterioration, or leakage.
Why Choose Genuine Watts Repair Parts
Using factory-authorized rubber components ensures material compatibility with the Series 957 valve body and internal tolerances. Aftermarket parts may not meet the same durability or dimensional standards, potentially leading to premature failure or failed inspections. Trust Watts OEM kits for dependable, code-compliant repairs.
Product Specifications
- SKU: 0889373
- Model / Kit Number: RK957
- Compatible Valve Series: Watts Series 957 Reduced Pressure Zone Backflow Preventer
- Applicable Valve Sizes: 2.5″, 3″, 4″
- Kit Contents: Rubber seals, O-rings, and elastomeric check valve components (as required for Series 957 in listed sizes)
- Brand: Watts
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