Watts 390 800 Lead-free Check Stop Kit

Product Description

The WATTS 390 800 is a lead-free check stop kit designed for use with Powers mixing valves in plumbing and hydronic systems. The check stop provides controlled flow shutoff and backflow prevention at the valve inlet, allowing service or valve removal without draining the system. This kit is built to lead-free standards, making it suitable for potable water applications where material compliance is required. Licensed plumbers and pipe fitters install this component as part of a complete mixing valve assembly in both residential and light commercial settings.

This check stop kit is used with thermostatic mixing valves in domestic hot water systems, including point-of-use and whole-building installations. It is particularly suited for healthcare, assisted living, and other applications where scalding protection and serviceability are code-driven priorities. The kit fits directly onto designated WATTS Powers mixing valve models and allows individual valve service without full system shutdown.

Key Features

• Lead-free construction meets potable water material requirements
• Enables in-line valve service without full system drain-down
• Provides backflow check and flow shutoff at the valve inlet
• Designed as a matched kit for specific Powers mixing valve models
• Compact form factor suitable for tight installation spaces

Compatibility

Compatible with LFM-431, LFM-432, and LFSH-1432 mixing valves.

Installation Notes

Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and IPC guidelines. Shut off the water supply and relieve system pressure before beginning any work on the mixing valve or check stop assembly. Do not overtighten fittings, as this may damage valve body threads or seat components. Verify lead-free compliance requirements with the local authority having jurisdiction prior to installation in potable water systems.

Technical Specifications

• Weight: 1.00 pounds
• Lead-Free: Yes

Standard Information

• Brand: WATTS
• Manufacturer Part Number: 390 800