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I live in Karachi, Pakistan. We have underground water tanks and use motors to transfer the amount of water required to overhead tanks that then supply the house.

I get lower pressure in my house's upper section bathrooms. I had the pipes replaced recently so there is not blockage. Its just the natural pressure.

I was wondering if someone could guide me towards the equipment and associated tips on how to install an additional motor to increase the flow.

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1 Answer 1

up vote 4 down vote accepted

The usual way I'd hook up a house to a tank or cistern (such as in a low-yield well situation) would be to have a pump going into a pressure system (pressure tank + switch) and then supplying the rest of the house. The pressure tank would normally operate at 40/60psi: When you draw water, you're always pulling from the tank until the pressure drops below 40psi, at which point the pump kicks on and runs until the pressure is 60psi.

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This system also shows the supply side coming from the well, but the supply is really irrelevant.

You can also use a jet pump or pretty much any other type of pump as opposed to a submersible so long as it's capable of reaching 60psi. Some people also run at 30/50. Over 80 and you risk toilet tank valves and faucets having trouble/leaking, and too low and it's just not useful (and the pressure switch probably has a low operating limit too).

There are also pressure switches that have a shut-off feature where if the pressure drops below 20psi, they totally switch off because they detect an "out of water" situation. This is a nice cheap way to go as opposed to more expensive electronic shut-off systems, but when they trip they require a manual reset (flipping the little arm on the side).

enter image description here

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