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Is your 800M4 pressure vacuum breaker leaking or malfunctioning? It may be in need of repair. The Watts WorkShop™ experts ...
walk you through this quick fix, including the tools you’ll need and the step-by-step procedures.
Tags:How To Repair a 800M4 Pressure Vacuum Breaker,800M4 Pressure Vacuum Breaker Repair,PVB Repair,Repairing Pressure Vacuum Breaker,plumbing,pressure vacuum breaker,Watts
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Watts Workshop Quickfix
Hi, m name is Chris.
Today we’ll be repairing the Watts model 800M4 Pressure Vacuum Breaker. Oftentimes in the field you may encounter a leaking or malfunctioning pressure vacuum breaker which may look like this. This condition may be caused by freezing temperature or debris inside the unit. Before beginning, check local regulations regarding the repair and maintenance of pressure vacuum breakers. Code restrictions may apply.
Start by closing the inlet and outlet ball valves. Next, remove the bonded assembly this can be done by hand, followed by the bonded O ring and vent assembly. Next, remove the check assembly by pressing down on the check retainer and rotating to rebuild the spring load followed by the check spring and check disc assembly. The assembly of the unit is the reverse of the disassembly. Start by installing the disc assembly ensuring that the fins are seated securely inside the seat.
Next, install the spring, followed by the spring retainer. Next, install the vent then the bonded O ring then screw the bond along by hand. To restart the unit, quickly open the inlet ball valve followed by slowly opening the downstream ball valve until the downstream piping is pressurized. On ¾ inch diameter or smaller units, you may need pliers to access the internal components due to the size of the body. The kits needed to complete the repairs for today can be obtained from your local Watts wholesaler.