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RP/IS-909S

No. 909QT-S 1

1

2

" shown

NOTICE

Inquire with governing authorities for local installation requirements

 

NOTICE

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 device be tested periodically in com-

pliance 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 preventers, should be flow tested and inspected 

internally in accordance with NFPA 13 and NFPA 25.

Installation, Maintenance, & Repair 

Series 909 and LF909

Reduced Pressure Zone Assemblies

Sizes: 

3

4

" – 2"

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 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 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 other repair kits and service parts, refer to our Backflow 

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

found on 

www.watts.com.

For technical assistance, contact your local Watts representative.

Summary of Contents for 909 Series

Page 1: ...nsistent 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 a...

Page 2: ...the relief valve is positioned below the first check This unique feature allows the valve to be installed either vertically or horizontally 7 Installation procedures must comply with all state and lo...

Page 3: ...ne and in an accessible location to facilitate testing and servicing A discharge line should be piped from the air gap at the relief valve connection making sure there is adequate drainage Never pipe...

Page 4: ...cock No 2 Step 2 Close test cock No 4 Disconnect bypass hose yellow at test cock No 4 Step 3 Open needle valve B low blue and C bypass yellow bleeding to atmosphere then closing needle valve B blue re...

Page 5: ...ing the first check valve cover 2 Lift off the first check valve cover The check valve inside will come out with the cover and is attached with a bayonet type locking arrangement 3 Holding the check v...

Page 6: ...misalignment Figure 1 Figure 2 Figure 3 Figure 1 To assemble the Relief Valve Assembly have a screwdriver ready Figure 2 Depress the Relief Valve Assembly carefully guiding it against the two pound s...

Page 7: ...trically ground the piping system and or electri cally isolate the device with plastic pipe immediately upstream and down stream of the device B 6 Valve improperly reassembled B 6 If valve is dis as s...

Page 8: ...r the cost of repairing or replacing other property which is damaged if this product does not work properly other costs resulting from labor charges delays vandalism negligence fouling caused by forei...

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