Watts 900 Series User Manual

Series 900
Reduced Pressure Principle Backflow Preventers
Sizes: 2
1
/2", 6" (65, 150mm)
• Service
• Replacement Parts
• Maintenance
For field testing procedure, send for IS-TK-DP and S-FT-TK9A.
For troubleshooting guide, send for S-TSG.
For other repair kits and service parts, send for PL-RP-BPD.
For technical assistance, contact your local Watts
representative. See back page.
Attn. Installer: After installation please leave this instruction
sheet for occupant's information.
Important: Inquire with governing authorities for local installa-
tion requirements.
Note: For Australia and New Zealand, line strainers should be
installed between the upstream shutoff valve and the inlet of the
backfl ow preventer.
RP-L900
Watts product specifi cations in U.S. customary units and
metric are approximate and are provided for reference only.
For precise measurements, please contact Watts Technical
Service. Watts reserves the right to change or modify prod-
uct design, construction, specifi cations, or materials without
prior notice and without incurring any obligation to make such
changes and modifi cations on Watts products previously or
subsequently sold.
RP-L900.indd 1 9/24/08 8:15:37 AM

Watts 900 Series Specifications

General

Brand	Watts
Series	900
Inlet Size Range	1/2" - 2"
Outlet Size Range	1/2" - 2"
Temperature Range	33°F - 180°F
End Connections	Threaded

Summary

Service Replacement Parts and Maintenance

First Check Valve Quick Cleaning Operation

Step-by-step guide for cleaning the first check valve using maintenance tools and safely opening the access door.

Removal of First Check Valve Assembly

Procedure for safely removing the first check valve assembly using specialized tools and handling precautions.

Dismantling of Second Check Valve

Instructions for disassembling the second check valve module, including handling safety and component removal.

Access Door Opening with Maintenance Tool Issue

Method to open the access door when the maintenance tool cannot be fully inserted due to relief valve position.

Replacement Parts Overview

Service Parts Kit Contents

Lists the components included in the service parts kit for the Series 900 backflow preventer.

California Proposition 65 Warning

Legal disclaimer regarding chemicals known to cause cancer or birth defects in California.

Limited Warranty Information

Details the manufacturer's warranty terms, exclusions, and limitations for the product.