Watts Regulator RK 909 CK2 3/4-1 Inch Repair Kit 0887121 AK

Description:

The Watts Regulator RK 909 CK2 3/4"-1" Repair Kit (Part No. 0887121 AK) is a genuine OEM second check valve repair kit designed for servicing 3/4 inch and 1 inch Watts 909 and LF909 Reduced Pressure Zone (RPZ) backflow preventer assemblies. The kit contains the essential internal components required to restore proper operation of the second check valve, helping maintain backflow protection and extend the service life of the assembly. It is intended for preventive maintenance and repair in commercial, industrial, and potable water systems.

Applications:

The RK 909 CK2 repair kit is widely used by plumbers, maintenance technicians, and facility managers to service Watts 909 and LF909 RPZ backflow preventers installed in municipal water systems, commercial buildings, hospitals, schools, industrial facilities, irrigation systems, and fire protection applications. Replacing worn second check components helps restore valve performance, prevent reverse flow, and maintain compliance with plumbing and cross-connection control requirements.

Technical Specifications:

• Manufacturer Part Number (MPN): 0887121 AK
• Model: RK 909 CK2 3/4"-1"
• Brand: Watts
• Product Type: Second Check Valve Repair Kit
• Compatible Models: Watts 909 and LF909 RPZ Backflow Preventers
• Compatible Valve Sizes: 3/4 in. and 1 in.
• Kit Type: Second Check Repair Kit
• Kit Contents: Disc Assembly, Spring, Seat, Seat O-Ring, Cover O-Ring, Lubricant
• Service Media: Potable Water
• Function: Restores Second Check Valve Performance
• Installation: Internal repair of existing backflow preventer
• OEM Replacement Part: Yes
• Special Tools Required: No
• Application: Reduced Pressure Zone (RPZ) Backflow Preventer Maintenance

Common Replacements:

• Watts RK 909 CK1 3/4"-1" Repair Kit
• Watts RK 909 VT 3/4"-1" Relief Valve Repair Kit
• Watts LFRK 909-T 3/4"-1" Total Repair Kit