[Shop-talk] pressure reducing valve

[Pat Horne]

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
>
> At 04:41 PM 3/23/2009, scott.hall at comcast.net wrote:
>> now I'm not sure if I have a safety pressure-relief valve. what's 
>> that look like?
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-- 
Pat Horne, Owner, Horne Systems 
(512) 797-7501 Voice		5026 FM 2001
Pat at HorneSystemsTx.com	Lockhart, TX 78644-4443
www.hornesystemstx.com
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