Watts 0794062 Rubber Parts

When you're servicing a 1 1/4" to 2" Watts 909M1 or LF909M1 reduced pressure zone (RPZ) backflow preventer, the Watts 0794062 relief valve rubber parts kit is the standard for field maintenance. This technical rebuild kit is the authorized Lead Free successor to legacy code 0887141 and is specifically engineered for modular relief valve service. As an updated RK 909M1 RV solution, it ensures seamless integration with the LFRK909M1-RV series, maintaining the hydraulic balance necessary to prevent fouling and nuisance spitting in high-demand industrial systems. By utilizing genuine Watts backflow repair parts, you preserve the assembly's original bypass functionality and sensing diaphragm sensitivity, which are critical for protecting potable water lines from high-hazard back-siphonage and backpressure conditions.

Key Benefits for Contractors

• Direct Compatibility: Engineered as the specific relief valve rubber kit for the 1 1/4", 1 1/2", and 2" 909M1 and LF909M1 models.
• Complete Internal Refresh: Includes a high-grade sensing diaphragm, disc assembly, seat O-ring, RV O-ring, and two piston O-rings to eliminate leak paths.
• Field Serviceable: Designed for rapid installation with included FDA-approved lubricant, requiring no specialized pullers or proprietary tools for the relief valve module.
• System Reliability: Replaces degraded elastomers that cause continuous dripping or failure to open during differential pressure drops.

Common Questions

Does this kit work for the first or second check valves?
No, the 0794062 is strictly a relief valve rubber parts kit. For check valve maintenance on the 909M1 series, you must specify the 0794064 or 0794065 kits depending on the check being serviced.

How do I stop my Watts 909 relief valve from spitting?
Intermittent spitting often indicates supply pressure fluctuations or a fouled first check. However, if the relief valve drips continuously, the elastomers in this Watts 0794062 kit are likely worn, or debris has compromised the seat O-ring seal.

Is this kit interchangeable with the older 1-inch models?
No. This kit is sized specifically for 1 1/4-inch to 2-inch large-bore assemblies. Using incorrectly sized O-rings or diaphragms will lead to immediate relief valve failure or improper discharge rates.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.