Water Pressure Imbalance twaddle

[uberfreak]

I installed a new Mira Mini Lite Thermostatic shower and after playing with it, turning it on and off 30 times, it stopped turning off. I called Mira and they are sending and engineer out, when i called they mentioned water pressure imbalance as a possible cause.

My hot water is at 1 bar coming from a combi and my cold could be as high as 4 or 5.

How do i regulate the cold water pressure is it a case of just closing the stop cock a little or is there a proper way of doing this?

Would water pressure imbalance break a shower and if it could how do i convince the engineer that i should have to pay for the repair?

 

[seco services]

how do you know its at 1 bar from the combi ? not by the gauge on the front i hope.

 

[kevplumb]

How do i regulate the cold water pressure is it a case of just closing the stop cock a little or is there a proper way of doing this?

pressure reducing valve

Would water pressure imbalance break a shower and if it could how do i convince the engineer that i should have to pay for the repair?

yes

and if it ain't fitted right ( according to the instructions)
you will

 

[uberfreak]

Thanks, so i need to fit the pressure reducing valve before the engineer comes that way i can claim that there wasn't a pressure imbalance...

Should I fit the valve at the stopcock or at the shower, i suspect having high pressure throught the house isnt a good idea right?

 

[seco services]

your getting a bit carried away.

wheres the 1 bar hot water come from ?
and the 4 - 5 bar cold mains ?

 

[uberfreak]

how do you know its at 1 bar from the combi ? not by the gauge on the front i hope.

yes, is that wrong then?

 

[uberfreak]

your getting a bit carried away.

wheres the 1 bar hot water come from ?
and the 4 - 5 bar cold mains ?

1 bar for the hot comes from the gauge on the combi and a plumber estimated that it was 4 or 5 bars for the cold.

There was hammering from the shower before it bust, thats what made me think it was pressure, i figured the hammering was caused by the high pressure going through the shower chamber.

 

[seco services]

that gauge on the front of your boiler is the pressure in the ch side not your dhw.
you won't loose 3 just cause its going through a boiler.

how do you know what your cold mains pressure is ?

 

[Deleted member 105431]

oh dear.

 

[uberfreak]

oh dear.

oh dear what, whats up, what is it?

 

[kevplumb]

thats the system pressure

nothing to do with the water

There was hammering from the shower before it bust

double ohh dear

 

[seco services]

estimated hasn't he got a gauge then?

no wonder it bust if your opening and shutting 30 times.

you may have high pressure but i wouldn't say you have unbalanced pressure.

 

[steve32]

you need to check l/m flow on hot and cold and working pressure hot and cold
hot and cold supplies need to be balanced at shower you may need to fit an in-line pressure reducer on cold supply to shower only
i think flow reducers are supplied with shower it will be in mi's

 

[uberfreak]

Right then, so possibly not unbalanced pressure, how can i find out for sure and what’s with the oh dears and double oh dears, I’m getting worried, is hammering coming from a shower a bad thing, I suspect it is given that it broke shortly after.

 

[kevplumb]

if you check the book there is a max working pressure

or "damage may result"