Plumbing Forum > pressure equalization
I think the easiest solution would be to ditch the equalising valve and take your cold feed from the same tank as supplies your hot water cylinder thus hot and cold would be of equal head ( ie. both gravity pressure). You will then need to consider the capacity of your water tank when considering to add a pump so this may need to be upgraded. Generally speaking a 50 gallon tank should suffice but consult the pump specs / manufacturer recommendations and warranty conditions. You may also need to modify the piping from your hot water cylinder to ensure the water being drawn off is free from air (ie. probably need tofit an air purge device such as a surrey flange).
Good luck - keep us posted.
scotty
Should also mention that on your existing arrangement you can't pump mains water. Against the regs.
Herbert
i have fitted a mixer shower but realized after the hot and cold water needed to be of equal pressures. i have gravity fed hot and mains cold ! so therefor took the advice of a plumber and fitted a pressure equalizing valve. it solved the problem but still the shower has low pressure from the rose. could i now fit an electric pump before the pressure equalizing valve?