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Old 06-07-2010, 02:20 PM   #1
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Dual Pressure tanks.


Hello. I have about 30" height clearance in my crawlspace. My 1/2 HP pump is rated at about 14gpm. The biggest tank i can fit standing up is a 26gallon with a 8gallon drawdown.. Pump theory says pump should run for aruond a minute so can i add a second pressure tank? How would you hookup 2 pressure tanks in one setup?

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Old 06-07-2010, 02:37 PM   #2
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Dual Pressure tanks.


You can install another pressure tank anywhere it will fit but preferably before any branches to different parts of the house.

Don't forget, after the tank pressure is calibrated and the system turned on and the pump has stopped, some of the space in the (each) tank will still be full of (compressed) air.

After the pump has stopped and when no one is using water, the pressure (in psi) is the same everywhere in the system from the faucets to the tanks to the pump output.

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Last edited by AllanJ; 06-07-2010 at 02:41 PM.
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Old 06-07-2010, 03:22 PM   #3
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Dual Pressure tanks.


I have room for an extra tank right beside the first tank. I'm just wondering how you would hook them up. Would they be hooked up in a series. tank 1 > tank 2 > discharge. or would i have to put a T or something after my pressure switch to both tanks, and then put a T to make it back into 1 line??
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Old 06-07-2010, 04:15 PM   #4
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Dual Pressure tanks.


Doesn't matter whether in series or parallel. You only need one air pocket to operate the pressure switch.
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Old 06-07-2010, 05:40 PM   #5
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Dual Pressure tanks.


Suggest arranging the tanks so water cannot become trapped in either one.

It is okay if the tanks have separate tee connections to the main pipe.
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Old 06-07-2010, 09:48 PM   #6
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Dual Pressure tanks.


Alright . Thanks dudes!

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