Watts 0794059 Valve Kit

The Watts 0794059 Relief Valve Kit is a critical field-service solution for maintaining backflow preventer 909 series assemblies. Designed for 3/4" and 1" lead-free reduced pressure zone (RPZ) units, this RK 909 VT total relief valve kit provides all necessary internals to restore hydraulic performance. This kit is cross-compatible and physically identical to Watts 0887126 and LFRK909-VT-3/4-1, ensuring a direct fit for lead-free relief valve repair. Contractors should note the inclusion of the seat, seat O-ring, stem and diaphragm assembly, and the disk assembly. Using genuine 0794059 replacement parts ensures the relief valve opens at the required differential pressure to prevent potential back-siphonage or backpressure. These Watts backflow repair kits are essential for annual testing compliance and maintaining the mechanical integrity of the sensing line and discharge port in potable water applications.

• Full Internal Restoration: Includes the complete relief valve module for 3/4" and 1" 909 series valves.
• Material Compliance: Lead Free construction meets all current potable water regulations for RPZ backflow preventers.
• Cross-Reference Accuracy: Drop-in replacement for the 0887126 and LFRK909-VT specifications.
• Field Reliability: Precision-molded diaphragms and high-grade elastomers withstand thermal expansion and pressure spikes.

Does this kit include the relief valve seat?
Yes, the 0794059 kit includes the seat and the seat O-ring, which are common failure points due to mineral buildup or debris scouring.

Will this work for both the 3/4 inch and 1 inch 909 models?
Yes, Watts engineered the 909 series to utilize the same relief valve internals for both the 3/4" and 1" body sizes, making the LFRK909-VT-3/4-1 universally applicable to both.

How do I know if the relief valve needs a rebuild or a simple cleaning?
If the 909 is constantly dripping or discharging, it often indicates a fouled seat or a ruptured diaphragm within the relief valve assembly, necessitating a full internal swap with this kit.

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.