Watts 994 User Manual download pdf

RP/IS-994/994RPDA

NOTICE

Inquire with governing authorities for local installation requirements

NOTICE

For Australia and New Zealand: Pipeline strainers should be installed

between the upstream shutoff valve and the inlet of the backflow

preventer.

994

Installation, Maintenance, & Repair

Series 994/994RPDA

Reduced Pressure Zone Assemblies

Reduced Pressure Detector Assemblies

Sizes: 2

⁄2" – 10" (65 – 250mm)

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 information is not consistent

with local building or plumbing codes, the local codes should be fol-

lowed.

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 intended. Regular checking and cleaning of the

product’s internal components helps assure maximum life and proper

product function.

WARNING

Read this Manual BEFORE using this equipment.

Failure to read and follow all safety and use information

can result in death, serious personal injury, property

damage, or damage to the equipment.

Keep this Manual for future reference.

Testing

For field testing procedure, refer to Watts installation sheets

IS-TK-DP/DL, IS-TK-9A, IS-TK-99E and IS-TK-99D found on

www.watts.com.

For troubleshooting guide, refer to literature S-TSG.

For other repair kits and service parts, refer to our Backflow Preven-

tion Products Repair Kits & Service Parts price list PL-RP-BPD

found on www.watts.com.

For technical assistance, contact your local Watts representative.

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Summary of Contents

Page 1 - Series 994/994RPDA

RP/IS-994/994RPDANOTICEInquire with governing authorities for local installation requirements NOTICEFor Australia and New Zealand: Pipeline strainers

Page 2 - 2 65 55 gpm 2

2Location and Installation Considerations1. Backflow preventers must be installed in high-visibility lo ca tions in order to allow for immediate noti

Page 3 - Above Ground

3Series 994 Installation Instructions*For additional information on Watts insulated enclosures refer to literature ES-WB.ParallelIndoorsAbove Ground12

Page 4

4Servicing First and Second ChecksSeries 994/994RPDA 4" and 6" (100 – 150mm)Removing Check Assemblies (Before servicing be sure shutoff valv

Page 5 - First Check

5Servicing First and Second ChecksSeries 994/994RPDA 8" and 10" (200 – 250mm)1. Slowly open all ball valves to relieve air and water press

Page 6 - Servicing the Relief Valve

6Servicing the Relief Valve 1. The relief valve may be serviced while on or off the backflow preventer valve. 2. NOTICE DO NOT USE A PIPE WRENCH

Page 7 - Test No. 1 - Relief Valve

7Testing - Reduced Pressure Zone AssembliesWatts TK-DLThe following Test Procedure is one of several that is recognized throughout the United States f

Page 8 - Troubleshooting Guide

Problem Cause SolutionA. Assembly discharges from differential relief valve during no flow condition.Fouled first check Disassemble and clean No. 1 c