I'm not sure if you're directing this to me or Scott, who was the
original poster. In my system, the tank is connected to a brass "T"
manifold. It has four threaded "ports". They are used for a boiler
drain valve, the pressure switch, a pressure gauge and the relief
valve pictured in the link below. The input side of the "T" has the
check valve. This keeps water from going back down the well, though
I have heard arguments for why this isn't necessary. The output side
of the "T" goes to supply all the water to the house. The "center"
branch of the "T" goes to the tank. The "other side" of the pressure
relief valve is not connected to anything. If the system pressure
exceeds 75 psi, water will be released onto the basement floor. It
sounds like the item Scott is describing is not really a valve, but a
pressure regulator, in-line with the water supply. These are not
uncommon in houses with municipal water when the street pressure is
too high. Still don't understand why you'd want/need one with a well, though.
-Steve
At 07:02 PM 3/23/2009, Pat Horne wrote:
>Usually this type of valve is connected to a water supply on the
>inlet, and the outlet is open to the atmosphere to allow the valve
>to limit the maximum pressure in the line. Is it possible that there
>is a check valve on the outlet of the pressure tank? If there is,
>and the outlet of the valve is open, it may be there to keep the
>pressure down on the line when/if the water heater malfunctions and
>overheats the water, causing an increase of pressure in the
>plumbing. This assumes that the outlet of the valve is open. If it
>is in line with the water supply as I read in the initial post, then
>it may just look like a pressure relief valve and be a pressure
>reducer or check valve instead.
>
>Peace,
>Pat
>
>Thusly spake Steven Trovato, On 3/23/2009 4:33 PM:
>>It looks like this:
>>
>>http://www.watts.com/pro/_productsFull.asp?catId=64&parCat=293&pid=798&ref=2
>>
>>Mine is 75 psi. In my application it is installed rotated 90
>>degrees left compared to that picture. The arrow points down.
>>
>>-Steve
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