Pressure reducing valve when no water used
- Thread starter Fallout
- Start date
It should be - the difference is between the design of a drop tight valve as against a standard Pressure Reducing Valve (PRV).
As well as when water is moving, when the water isn't moving then a drop tight valve should lock shut and stop any creep by the way the spring and diaphragm is designed. A non drop tight valve isn't designed the same way and then the higher pressure upstream can lift the valve as it's trying to equalise to the low side. I guess if a PRV isn't drop tight then it really shouldn't be called a PRV
As well as when water is moving, when the water isn't moving then a drop tight valve should lock shut and stop any creep by the way the spring and diaphragm is designed. A non drop tight valve isn't designed the same way and then the higher pressure upstream can lift the valve as it's trying to equalise to the low side. I guess if a PRV isn't drop tight then it really shouldn't be called a PRV
That's and that will only lift (if set to 3 bar) when the pressure drops below 3 bar. If say open a tap
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