Watts RK-909-CK2-6 Backflow Preventer Second Check Valve Kit

Description:

The Watts RK-909-CK2-6 Backflow Preventer Second Check Valve Kit (Part No. 0887217) is a genuine OEM repair kit designed for servicing the second check assembly in 6-inch Watts 909 Reduced Pressure Zone (RPZ) backflow preventer assemblies. The kit includes the components necessary to restore proper second check valve operation, helping maintain reliable backflow protection and extend the service life of the assembly. It is intended for preventive maintenance and repair in commercial, industrial, municipal, and potable water systems.

Applications:

The RK-909-CK2-6 repair kit is widely used by plumbers, maintenance technicians, water utilities, and facility managers to service 6-inch Watts 909 RPZ backflow preventers installed in commercial buildings, industrial plants, municipal water systems, irrigation networks, hospitals, schools, and fire protection systems. Replacing worn second check components helps restore valve performance, prevent reverse flow, and maintain compliance with cross-connection control and plumbing regulations.

Technical Specifications:

• Manufacturer Part Number (MPN): RK-909-CK2-6
• Ordering Code: 0887217
• Brand: Watts
• Product Type: Second Check Valve Repair Kit
• Compatible Model: Watts 909 Reduced Pressure Zone (RPZ) Backflow Preventer
• Compatible Valve Size: 6 in.
• Kit Type: Second Check Kit
• Primary Components: Disc Assembly, Spring, and Cover O-Ring
• Service Media: Potable Water
• Function: Restores second check valve performance
• Installation: Internal repair of existing backflow preventer
• OEM Replacement Part: Yes
• Lead Free: No (standard RK series; lead-free equivalent available as LFRK 909-CK2-6)
• Application: Maintenance of 6-inch RPZ backflow prevention assemblies

Common Replacements:

• Watts LFRK 909-CK2-6 Second Check Repair Kit
• Watts RK-909-CK1-6 First Check Repair Kit
• Watts RK-909-VT-6 Relief Valve Repair Kit