Shower head pressure?

Question

I have just installed a sequential shower in the upstairs bathroom but it is only running cold. The hot cylinder is in the same room as the shower and the cold is fed from a tank in the roof. the head of the shower is higher than the cylinder, so my question is, do I need a twin impeller shower pump or is there another way?

Answer 1

the shower is ok above the hot tank

the hot and cold are balanced pressure currently

you should check isolation valves are open, filters are clean  and that the temp control in the shower is adjusted correctly

there may be an airlock in the hot supply so see if you can open the end of the hot pipe and check if theres a flow

is the shower suitable for gravity fed hot and cold?

if you want a pump you need 50 gallons of cold water in the tank min and to maybe make changes to the hot supply. some of the simpler twin pumps dont need a surrey or essex flange, but it is better, as they draw relatively small amounts of hot water

ps mal g has not understood whats going on or what to do

Answer 2

It will be the hot water that is fed from the tank in the attic, and the cold from mains pressure. Yes I know the water in the tank is cold, but it is gravity fed into the cylinder where it is heated, then to taps and the shower head. Take the shower head and put it as low as possible in the cubicle, if the water gets hot then there is obviously not enough pressure on the hot water.

To be honest, if it was me, given the position of the cylinder, I would have gone for a power shower, fed from the cold supply only.

Look in on your local plumbing and heating supplier, they will give advice on the possible fitting of a pump.

Answer 3

you will need indpendant hot and cold water feeds of equal pressure to supply the shower via a twin impeller pump you will need a surrey or a essex flange to tap into the hot cylinder