Watts 0887709 Repair Kit

The Watts 0887709 (RK 800M4V) is a professional-grade pressure vacuum breaker vent float kit designed specifically for the 1/2" and 3/4" 800M4 series backflow preventers. Engineered for field reliability, this factory replacement kit allows technicians to address discharge from the vent or failure to seal during low-pressure conditions without replacing the entire assembly. The components are manufactured from high-impact, corrosion-resistant materials to ensure long-term performance under demanding hydraulic cycles.

Installation of the Watts RK 800M4V 1/2"-3/4" repair kit is straightforward, requiring no specialized tools for standard servicing. This genuine OEM kit includes the essential internal components needed to restore atmospheric venting functionality, which is critical for preventing back-siphonage of contaminated water into the potable supply. It is fully compatible with both the standard 800M4 and the lead-free LF800M4QT models, ensuring a precise fit and restoring the assembly to original factory specifications.

• Direct Compatibility: Fits 1/2 inch and 3/4 inch Watts 800M4 pressure vacuum breaker assemblies and their lead-free counterparts.
• Complete Vent Overhaul: Includes a high-grade float vent disc assembly (vent float, seal, and spring) and a durable bonnet O-ring.
• Ease of Service: Designed for rapid on-site maintenance; helps technicians resolve nuisance tripping or continuous leaking at the vent.
• OEM Reliability: Genuine Watts parts ensure the backflow preventer repair maintains its original safety listing and performance ratings.

What are the symptoms of a failing 800M4 vent float?
Technicians typically observe water leaking from under the canopy during the start-up phase or constant weeping from the vent when the system is pressurized. This indicates the vent float kit is not seating correctly or the spring has lost tension.

Does this kit include the bonnet or just the vent internals?
The Watts 0887709 is the vent float kit only. It includes the float and the necessary seals/springs to repair the vent section. If the bonnet itself is cracked or the threads are stripped, a separate bonnet kit (RK 800M4-B) would be required.

Is this kit interchangeable with the 1" size PVB?
No, this kit is specifically sized for 1/2" and 3/4" units. For 1" 800M4 assemblies, you must use the RK 800M4-V 1 (part number 0887710) to ensure proper sealing diameters.

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.