Watts 0887121 Kit

Maximize the service life and field reliability of your backflow prevention systems with the Watts 0887121 Second Check Kit. Explicitly engineered for the 3/4" to 1" Watts 909 Series and Watts LF909 reduced pressure zone (RPZ) assemblies, this comprehensive RK 909-CK2 repair kit ensures a factory-spec seal to prevent backsiphonage and backpressure in potable water lines. As a veteran-grade backflow preventer repair kit, it includes the essential OEM components: a precision-aligned disc assembly, a high-tension stainless steel spring, a durable seat, and high-grade seat/cover O-rings with silicone lubricant for a leak-free installation.

The Watts 0887121 functions as the direct internal replacement for legacy part numbers 881469, 881494, and 887121. By utilizing lead-free, genuine Watts components, service technicians can perform standard maintenance without specialized tools, maintaining the hydraulic integrity of the second check valve. This kit is critical for contractors managing annual certification testing and field repairs on RPZ backflow preventers within commercial and industrial plumbing infrastructures.

• Universal Compatibility: Serves as the direct replacement for 3/4" and 1" Watts 909 and LF909 models, cross-referencing legacy part numbers 881469 and 881494.
• Complete Internal Overhaul: Includes the disc assembly, spring, seat, and all required elastomers to ensure the second check meets original pressure-drop specifications.
• Field-Optimized Design: Streamlines the maintenance process with a drop-in RK 909-CK2 configuration, requiring no special tools for component extraction or seating.
• Material Integrity: Features high-quality spring and seat components designed to withstand fluctuating line pressures and harsh water conditions.

Is this kit compatible with the lead-free LF909 series?
Yes, the 0887121 kit is designed for use in both the standard 909 and the lead-free LF909 Reduced Pressure Zone assemblies in the 3/4" to 1" size range.

What is the difference between an RK 909-CK1 and an RK 909-CK2?
The CK1 kit is for the first check valve, while the RK 909-CK2 (0887121) is specifically for the second check valve. They utilize different spring tensions and internal configurations and are not interchangeable.

Does this kit include the relief valve components?
No, this kit is strictly for the second check valve. For relief valve servicing, a separate RK 909-VT or RK 909-RV kit would be required.

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.