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Old 12-03-2016, 04:24 PM   #1
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very strange to me


Hi all
Maybe you can explain this to me???
My son's home is 75 years old
The basement was finished before he bought it, so we can't see the piping.
There are two separate hose bibs at opposite ends of the house.
Both have their own shutoffs.
Here is the puzzle.
On the street side of each shutoff there is a tee,elbow and pipe which I have figured out connects the 2 hose bibs.

Both shutoffs need to be off in order to turn off both hose bibs, but if either shutoff is on then both hose bibs are on as well.
Why would they be interconnected in this manner?????

Thanks in advance for all your help and advice.

Ralph
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Old 12-03-2016, 06:11 PM   #2
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Re: very strange to me


Some sort of cross connection. Does not sound normal.
Perhaps the house at one time a had a pump and well that was used for the outside water and they had a cross connect to city water for when needed?
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Old 12-03-2016, 06:12 PM   #3
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Re: very strange to me


Someone piped them wrong. Each hose bibb should have it's own shutoff.
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Old 12-03-2016, 10:49 PM   #4
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Re: very strange to me


jOED The house always had city water.
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Old 12-03-2016, 11:03 PM   #5
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Re: very strange to me


ghostmaker
Doesn't make sense to me either. Not being able to see the layout I'm at a loss.
All I know for sure is that both bibs are connected through this extra piping.
with both shutoffs off nothing else in the house is effected. If we blow air into one open bib it comes out the other open bib. Beats the hell out of me as to why they did it. Extra volume maybe. Two 1/2 copper supplies for each bib????????
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Old 12-04-2016, 01:32 AM   #6
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Re: very strange to me


Any evidence that one feed ever connected to hot water.... thinking maybe it was a shortcut to sometimes direct hot to each bib.??????
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Old 12-04-2016, 07:50 AM   #7
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Re: very strange to me


Quote:
Originally Posted by MTN REMODEL LLC View Post
Any evidence that one feed ever connected to hot water.... thinking maybe it was a shortcut to sometimes direct hot to each bib.??????
No .
some day if my son tears out the ceiling to remodel we might figure it out.
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Old 12-04-2016, 08:58 AM   #8
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Re: very strange to me


By shut off I assume you mean stop valves. By street side I assume you mean the hose bib side of the stop valve.

Someone probably put the extra piping in in order to drain the piping to prevent freezing and bursting. In order to prevent freezing you must not only turn off the water inside the heated space, you must also drain the pipe. In order to drain the pipe you must let air in.
The person that did the plumbing must not have known that there is such a thing as a "stop and waste" valve. That is a stop valve with a small side port for letting air in.

By putting in the piping connecting the two hose bibs, when you turn off both stop valves and open both hose bibs, the water will drain out one hose bib and suck air in the other.
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Old 12-04-2016, 03:22 PM   #9
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Re: very strange to me


Quote:
Originally Posted by hkstroud View Post
By shut off I assume you mean stop valves. By street side I assume you mean the hose bib side of the stop valve.

Someone probably put the extra piping in in order to drain the piping to prevent freezing and bursting. In order to prevent freezing you must not only turn off the water inside the heated space, you must also drain the pipe. In order to drain the pipe you must let air in.
The person that did the plumbing must not have known that there is such a thing as a "stop and waste" valve. That is a stop valve with a small side port for letting air in.

By putting in the piping connecting the two hose bibs, when you turn off both stop valves and open both hose bibs, the water will drain out one hose bib and suck air in the other.


That makes some sense, except both stops were stop and waste valves.

We have replaced both stops with new stop and waste ball valves, and we are going to cut the loop and cap both ends.
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