Boosting Hot Water When Your Cold Water is Mains Pressure

A Shower Power Booster will Boosting Gravity Hot without the need to boost Mains Pressure Cold.

[dap]

Very helpful diagram. It may explain why I get double the pressure/volume at cold taps, but hot taps are all half pressure/volume. I find no restrictions or leaks in my system so I can't come up with why I get the pressure differential. Come to think of it, your system diagram indicates the entire system ought to be at whatever pressure is found in "Mains Cold Supply." For the reason that everything is downstream. Unless the "Cold Water Tank" is a step down on pressure - which would explain why you English are all enthusiastic about boost pumps. Not sure we see that in USA.

[Wayne-Jones]

Note to anyone watching, if you have cold main and gravity feed hot, you will probably find it difficult to dial in a stable shower temperature due to unequal pressures, adding a pump to the hot should help.
Question for Alan, would it be feasible to add a pump after the shower mixer so it pulls on both hot and cold? I have Gravity system.

[rafordy]

If you install two pumps inline you won't get double the duty of the single pump

[bornbfrea]

is it also worth incorporating a water pressure equalising valve as well as using pump(s) to boost the hot water pressure when gravity fed?

[chriswesley]

Wow. This looks like exactly what I need, but I've been told by a plumber that putting a pump on the hot (gravity) and then feeding that and mains cold to a mixer shower won't work well as the pressures aren't equal. Is that true?

[bidders]

would this work with rain water tank that I would like to use to supply my toilet, I've got it hooked up already but there's not enough pressure to work the fill valve

[Eyes_In_Your_Darkness]

Two pumps ??? Just buy one that can do the job