We live in an independent house comprising of ground floor and 1st floor in Bangalore. We fully depend on corporation water for our water needs. We have a sumptank of 6000 ltrs and 2 over head tanks of 1000 ltrs each (both connected in parallell) The portions on the 1st floor experience low water pressure in all taps & showers, when we contacted a plumber he said it is because the over head tank is not high enough.

Now we cannot increase the height of the tank, is there any solution to increase the water preassure in the 1st floor houses? Is there some kind of motors or pumps which can help us? Kindly suggest an appropriate remedy to the same.

You could install a pump and a pressurized tank system.

Inline booster pump. Many are designed for gravity systems.

Was it always that way ?

If the water pressure dropped only in sinks and shower heads - see if you can clean aerators and filter screens, possibly remove flow restrictor from shower head.

Back to you

Milo

To have even thirty pounds of pressure the tank would have to be about 70 feet above you. I would think that is not the case. I'd look at a booster pump.

BTW, how are these tanks mounted? 6,000 liters is about 1500 gallons, and that's a good sized tank. Are they elevated at all?

Inline CP | Constant Pressure/Boosting Systems | Water Systems | Little Giant | Franklin Electric (http://littlegiant.com/products/water-systems/constant-pressureboosting-systems/inline-cp/)

There are many others out there... inline boosters are helpful.

For the non-Indians:

https://rainwaterharvesting.wordpress.com/2013/10/31/on-the-sump-tanks-of-bangalore/