Watts 919 Series Installation, Maintenance & Repair
Reduced pressure zone assemblies, sizes: 1/4"-2" 8-50mm
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Also See for 919 Series:
- Installation, maintenance & repair (4 pages) ,
- Manual (8 pages) ,
- Manual (18 pages)
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Installation, Maintenance, & Repair
Series 919 and LF919
Reduced Pressure Zone Assemblies
Sizes:
⁄
" – 2" (8 – 50mm)
1
4
!
WAR NI NG
You are required to thoroughly read all installation instructions
and product safety information before beginning the installa-
tion of this product. FAILURE TO COMPLY WITH PROPER
INSTALLATION AND MAINTENANCE INSTRUCTIONS
COULD RESULT IN PRODUCT FAILURE WHICH CAN
CAUSE PROPERTY DAMAGE, PERSONAL INJURY AND/
OR DEATH. Watts is not responsible for damages resulting
from improper installation and/or maintenance.
Local building or plumbing codes may require modifications to
the information provided. You are required to consult the local
building and plumbing codes prior to installation. If this informa-
tion is not consistent with local building or plumbing codes, the
local codes should be followed.
Need for Periodic Inspection/Maintenance: This product
must be tested periodically in compliance with local codes, but
at least once per year or more as service conditions warrant.
Corrosive water conditions, and/or unauthorized adjustments
or repair could render the product ineffective for the service in-
tended. Regular checking and cleaning of the product's internal
components helps assure maximum life and proper product
function.
919QT
NOTE: For Australia and New Zealand, line strainers should be
installed between the upstream shutoff valve and the inlet of the
backflow preventer.
Its important that this assembly be tested periodically in compli-
ance with local codes, but at least once per year or more as
service conditions warrant. If installed on a fire sprinkler system, all
mechanical checks, such as alarm checks and backflow preven-
ters, should be flow tested and inspected internally in accordance
with NFPA 13 and NFPA 25.
Testing
For field testing procedure, send for IS-TK-DL, IS-TK-7,
IS-TK-9A, IS-TK-99E AND IS-TK-99D.
For other repair kits and service parts, send for PL-RP-BPD.
For technical assistance, contact your local Watts
representative.
RP/IS-919
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Summary of Contents for Watts 919 Series
- Page 1 CAUSE PROPERTY DAMAGE, PERSONAL INJURY AND/ service conditions warrant. If installed on a fire sprinkler system, all OR DEATH. Watts is not responsible for damages resulting mechanical checks, such as alarm checks and backflow preven- from improper installation and/or maintenance.
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Page 2: Installation Instructions
Series 919 and LF919 ⁄ " – 2" (8 – 50mm) Indoor Installation Reduced Pressure Zone Assemblies Watts Indoor Installation ⁄ " – 2" (8 – 50mm) 919 For indoor installations, make sure the Series 919 and LF919 is easily accessible to facilitate testing and servicing. Do not install in concealed locations. - Page 3 Installation Instructions Series 919 and LF919 Watts ⁄ " – 2" 919 *Vertical Flow Down ⁄ " – 2" (8 – 50mm) A. Shutoff Valves: If you remove the shutoff valves from the Series 919 and LF919, reassemble the shutoff valve with the test cock mounted on the inlet side of the unit.
- Page 4 Servicing the Relief Valve Series 919 and LF919 ⁄ " – 2" (8 – 50mm) NOTES: 1. No special tools are required to service the Series 919 and LF919 ⁄ " - 2". 2. Before servicing, make sure the water is turned off or shutoff valves are closed. The following procedures provide information for replacing the diaphragm, the relief valve disc, and the relief valve seat.
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Page 5: Repair Kits
Servicing the Relief Valve Series 919 and LF919 ⁄ " – 2" (8 – 50mm) Relief Valve Seat Relief Valve Body Spring Relief Valve Seat O-ring Relief Valve Cover Relief Valve Disc Screw Cover Bolts Relief Valve Disc Relief Valve Stem Relief Valve Diaphragm Diaphragm Nut Relief Valve Cover O-ring... - Page 6 Servicing First & Second Check Valves Series 919 and LF919 ⁄ " – 2" (8 – 50mm) NOTES: 1. No special tools are required to service the Series 919 and LF919 ⁄ " - 2" (8 – 50mm). 2. Before servicing, make sure the water is turned off or shutoff valves are closed.
- Page 7 Servicing First & Second Check Valves Series 919 and LF919 ⁄ " – 2" (8 – 50mm) Check Disc Holder Check Assembly Check Disc Rubber Check Disc Washer Check Disc Screw Check Seat Check Seat O-ring Cover Cover O-ring Check Spring Check Valve Kits ⁄...
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Page 8: Troubleshooting Guide
For additional cross-connection control information, send for F-50 brochure. Limited Warranty: Watts Regulator Co. (the “Company”) warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment.