Watts 800M4 Series Installation, Maintenance & Repair

Installation, Maintenance, & Repair
Series 800M4 and LF800M4
Anti-Siphon Pressure Vacuum Breaker
featuring Replaceable Seats
Sizes: ⁄ " - 2" (15 - 50mm)
1
2
Models: 800M4FR, 800M4QT, LF800M4FR, LF800M4QT
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.
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.
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.
Pressure — Temperature
Working Temperature: 33°F - 140°F (0.5°C - 60°C)
Maximum Pressure: 150psi (10.3 bar)
Minimum Pressure: 15psi (103 kPa)
Installation
Requirements:
1. Install 12" (305mm) above highest point of downstream piping
see Fig. 1.
2. Install bonnet side up and allow for accessibility for testing/service.
3. Install where discharge or spillage is not objectionable.
4. Do not undersize supply or oversize the valve in relation to demand.
5. Do not install where backpressure can occur.
6. Protect from freezing - for Freeze Protection specify Model 800M4FR or
LF800M4FR. Freeze protection can also be provided using a WattsBox
insulated enclosure. Send for ES-WB for additional information.
7. ASSE Standard 1020 requires that the atmospheric vent valve remains
open until the valve body pressure exceeds 1 lb. Until this pressure is
reached, some amount of spillage will occur at the atmospheric vent.
In order to minimize this leakage on start-up close the down stream
shutoff valve and open inlet shutoff valve quickly.
Service:
1. Open test cocks to drain in cold climates if only operated seasonally.
2. Replace rubber goods every 5 years.
WattsBox
Watts 800M4QT/
LF800M4QT
⁄ ", ⁄ " (15, 20mm)
1 3
2 4
Watts 800M4QT/
LF800M4QT
1" - 2" (25 - 50mm)
Fig. 1
RP/IS-800M4QT