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General Plumbing and Gasfitting Talk => Ask Plumbers (Public) => Plumbing => Q & A - Water Pressure => Topic started by: roberto on July 01, 2013, 07:38:36 PM

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Title: vent height for a 7.6m prv?
Post by: roberto 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

Title: Re: vent height for a 7.6m prv?
Post by: robbo 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