Watts RK 770-CK4 8 Double Check Backflow Preventer

The Watts RK 770-CK4 8 is a genuine first or second check kit for 8" 770 double check valve assemblies.

This 8" check valve repair kit for series 770 is designed to protect drinking water supplies from dangerous cross-connections in accordance with national plumbing codes and water authority requirements. This kit consists of a spring assembly and a cover O-ring. Check with local inspection authorities for installation requirements.

Features

• Factory replacement kit
• No special tools required for changing parts
• All parts are made of high quality materials
• Check kit

Common Questions

Will this kit fit my valve?

The RK 770-CK4 8 fits the 8" size of Watts series 770. Kits are size- and series-specific, so match the model stamped on your valve body or cover before ordering.

What's included in this kit?

This is a first or second check kit. Kit consists of: a spring assembly and a cover O-ring.

Are these genuine Watts parts?

Yes. This is the factory RK 770-CK4 8 kit built with genuine Watts OEM components. Aftermarket parts can void your assembly approval and are commonly rejected by inspectors at annual test time.

Which kit do I need if my relief valve failed the test?

Not this one — this kit services the check valve. A failed relief valve needs the RV (rubber parts) or VT (total relief valve) kit for 770 in your size; a total repair (T) kit covers the relief valve and both checks.

Specifications

• Type: Double Check
• Country of Origin: United States
• Warranty: 1 Year Limited
• MPN: RK 770-CK4 8
• Lead-Free: No
• Product Role: repair_kit
• Kit Type: First or Second Check Kit
• Fits Brand: Watts
• Fits Valve Series: 770
• Fits Valve Size: 8"
• Used With: 8" 770
• Kit Contents: Kit consists of: a spring assembly and a cover O-ring.
• Watts Ordering Code: 0887072
• Genuine OEM Parts: Yes