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Author Topic: vent height for a 7.6m prv?  (Read 1834 times)

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Offline roberto

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vent height for a 7.6m prv?
« on: July 01, 2013, 07:38:36 PM »
hi guys,

I have a tank on my roof and I want to increase the Pressure/flow, I'm thinking about replacing the tank with a 7.6m Reducing valve,

I was wondering how high can I have the vent?, it is open vented (have a wetback so cant put a relief valve on,  I will lag the vent and tie it down if needed,

Is it depending how high or where the Reducing valve is situated?, if possible I will put the Reducing valve under the floor directly off the main after a 3 in 1.


cheers


Linkback: https://www.plumbers.nz/q-and-a-water-pressure/50/vent-height-for-a-7-6m-prv/1495/

Offline robbo

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Re: vent height for a 7.6m prv?
« Reply #1 on: July 01, 2013, 09:04:31 PM »
hi roberto,you will need 7.6mtrs of water pressure above the prv to shut it off, if you can`t get that you can just reduce pressure untill open vent has stopped running,cheers


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