booster pump

[lee8huang]

We installed a tankless water heater Bosch 240SX in our house. it takes about 1GPM to turn on. But the flow rate is low such that it fails to turn on frequently. It turns out that the shower is far from the water heater, and it is affected by other taps along the line.
The flow rate at the shower head is low. I found that what one tap is on, the water pressure at the shower head is dropped to 26psi from 40psi.
Unwilling to go through trouble of taking the wall down to fix the pipping, I am thinking of using a booster pump, after the water heater. Will it make any difference before or after the water heater? or is there other better way to deal with this problem?
Thanks
Lee

 

[BigInch]

Conventionally it should go into the cold water piping that feeds the the heater. You will have equal pressure in both the hot and cold water systems.

If you install a booster after the heater, you would have too much pressure in the hot water system in comparison to what you have available in the cold water piping. It would tend to make adjusting the temperature of the water very difficult.

You should considering adding a bladder tank between the pump and the heater. This will allow the pump to turn on, pressure the tank and turn off. Generally you will be able to use a much smaller pump and you will have a pressured supply of both hot and cold water available at all times.


Going the Big Inch!

http://virtualpipeline.spaces.msn.com

 

[PEDARRIN2]

You should not put the booster heater after the water heater.

You could get cross over from the hot to the cold water piping at your fixtures and end up getting hot water when you want cold water.