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PSV is for gay people and PRV is for retards
The main Pressure Reducing Valve (PRV) can typically be anywhere between the City Water shutoff valve by your water meter (if external) and the first "tee" in the water supply system. Though quite often it is near the main building shutoff valve inside the home.Some fixtures or appliances have their own PRV, like a hydronic heating system.
WHAT IS A PRV IN BUILDING AUTOMATION
PRV in swine is Pseudorabies Vaccine.
PRV
It usually enters the house in a basement or garage. There will almost always be a PRV and a main shutoff valve where it enters. Look in those places.
A PRV is the acronym of a Pressure Reducing Valve. Every house connected to a City water supply will have one of these installed in the main incoming water pipe on your side of the meter. The purpose is to reduce the pressure from street pressure which can be 80-100 PSI, to a pressure compatible with household pipes and fittings. Generally 50-70 PSI is desired in a house. The standard PRV comes pre-set at 50 or 70 PSI and can easily be adjusted about 15 PSI each way. This is a bell shaped device usually fitted near your main water shutoff valve and always has instructions tagged to it explaining adjustments.
The residential house Pressure Reducing Valve (PRV) usually has setting capabilities of between 25-75 PSI. Normally, 50 PSI is suitable.
Type your answer here... Depends on your local codes, If the main line does not have a double check valve and the waterheater has PRV then I would say no you do not need one.
If your pressure exceeds the setting of the PRV or is below the setting
Hot water tank? On a water heater tank there is always a extra black plug in case you need to change your way of installing the pipes to it. The plug on most electric water heaters are opposite of your PRV valve (pressure relief valve) so if your PRV valve is on top then your plug will be on the side and if your PRV is on the side then your plug will be on top of the water heater if its electric.
Depending on who is asking and the type of cylinder, w/ or w/out PRV and location of the PRV, acceptable answers: Neck, Primary Manifold Access, Inlet/Outlet, Breach Point, Secondary Valve Access. Charging Access Point