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Forum topic by pete57 posted 10-13-2012 04:17 AM 1106 views 0 times favorited 6 replies Add to Favorites Watch
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134 posts in 3610 days

10-13-2012 04:17 AM

Topic tags/keywords: question

Been busy over the summer working a real job. Hopefully a lay off for the winter soon?? It seems that the time has come to seriously start looking at building that shop. I have decided that 28’X44’ will do just fine with a Gabriel roof and an upstairs. Hopefully a 28’X48’ if I can get the variance on the 25’ code on the side property line. Anyway, I planned on putting a well in for this building, but no now. I want to run a ¾ inch line from my home to the new barn and it is only 30-35 feet, but the pressure comes to mind especially having a full upstairs bathroom.

Question: has anyone ever put an inline water pressure tank in before? I want to put a shut off valve in the house and have the line go to the barn where a pressure tank can build up pressure.

Any thoughts?

-- Humble Wood Servant

6 replies so far

View patron's profile


13640 posts in 3540 days

#1 posted 10-13-2012 04:35 AM

anywhere along the line
will still be pressure
even from the shop
to upstairs

i have a pressure switch on mine
that kicks the pump
when the pressure drops

the bigger the tank
the less the pump runs

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View Lifesaver2000's profile


556 posts in 3311 days

#2 posted 10-13-2012 01:55 PM

A lot depends upon your source pressure and available volume, but for most typical situations a 3/4 inch line running only 35 feet should not be a problem. You can figure on loosing about 5 PSI of water pressure for each floor of elevation.

You also did not mention what you will have in your shop. If you are only putting a bathroom and handwashing area, then it usually doesn’t take much to supply those.

If the pressure in your house is already on the marginal side, especially when you have water flowing (like if filling the bathtub causes a large pressure drop) then that is a different situation. First of all, upgrading your pipe from 3/4 inch to 1 inch doesn’t cost all that much and will reduce the pressure drop when water is flowing to your shop. Also, putting a pressure tank in your shop as you suggest isn’t a bad idea.

If your water source in your home is a public water system be sure that, at a minimum, you put a good check valve in your shop supply line before the pressure tank. You should probably consult your PWS operator to see what their requirements are.

If your house’s water source is a well, then the tank in your shop could actually supplement your household water supply during high demand.

View matt garcia's profile

matt garcia

1902 posts in 3871 days

#3 posted 10-13-2012 03:30 PM

I work in my garage, no help here. Sorry!!!!

-- Matt Garcia Wannabe Period Furniture Maker, Houston TX

View pete57's profile


134 posts in 3610 days

#4 posted 10-13-2012 11:55 PM

I am on a well system, pressure is good. I do not want to upset the system. I was going to run a 2.5” conduit under ground with long sweep elbows to the building. The plan was to change the larger tank in the house and use that tank in the garage. I have a full bath going upstairs and a half bath downstairs with a standing mop-sink in the shop where I plan to put the sharpening stones and machines. is where I am having the building built and I am doing the floor and installing all the windows and doors. I live on a hill with a walkout basement and plan to have the second floor of the new building tie into the deck that is off my kitchen dining area of the house. The rooms that the bathrooms will be going will be living spaces if needed.

-- Humble Wood Servant

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556 posts in 3311 days

#5 posted 10-14-2012 02:33 AM

I would say your plan should work fine. As close as the two places are together you probably don’t need the second tank, but it shouldn’t hurt anything and might keep the pressure steady in the garage if for some reason you have multiple things going out there at once.

With the two tanks together you should also gain the benefit of being able to draw down more water before the pump has to kick on, just as Patron said concerning a larger tank. I know from past days when I lived on a well system that the extra capacity is nice when the power to the pump goes out for a while.

View lunn's profile


215 posts in 2508 days

#6 posted 10-14-2012 12:00 PM

Check the pressure switch on the pump some are set on at 20 off at 30 lbs pressure. Change to a 30-50 you’ll also have to change the air pressure in the tank to match the switch.

-- What started as a hobbie is now a full time JOB!

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