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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

Summary of Contents for 900 Series

Page 1: ...mportant 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 backflow preventer RP L900 Watts product specifications in U S customary units and metric are approximate and are provided for reference only For precise measurements please contact Watts Technic...

Page 2: ...in a suitable receptacle F Inspect 1st check valve seat and discs for damage or deteri oration after wiping with a clean cloth G If damage or deterioration to either seat is evident remove the eight socket head screws and remove seat and gasket from valve See photo A H Reverse above procedure for reassembly Note Lubricate seat gasket with O ring grease Removal of First Check Valve Assembly I Inser...

Page 3: ...lding Allow valve to close Caution Keep fingers clear of closing P If second check valve is damaged or deteriorated remove six bolts from the flange of the second check valve module and remove the module Q After disassembly and cleaning reassemble the check valve module in the position shown in photo B R Inspect access door O ring seal to be sure it is in its proper position and close the door Rea...

Page 4: ...MPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty and the Company shall not be responsible for any incidental special or consequential ...

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