shower pump

[nabby68]

i intend to fit a shower pump in my loft, which will pump to a shower in my bathroom, are there any specific types that i need?

 

[Bamber gaspipe]

i intend to fit a shower pump in my loft, which will pump to a shower in my bathroom, are there any specific types that i need?

If you explain to your intentions to your local plumbing merchants they will advise on different makes etc. If you`re fitting a pump it`s best to site it as close as possible to the Hot outlet from the cylinder. Is the loft closest?

 

[nabby68]

the loft is the closest because the airing cupboard, where the hw cylinder is, is too close to a bedroom and would be noisy. do i have to fit an anti-gravity loop and essex flange?

 

[Bamber gaspipe]

the loft is the closest because the airing cupboard, where the hw cylinder is, is too close to a bedroom and would be noisy. do i have to fit an anti-gravity loop and essex flange?

Yes, & a manual vent should be fitted at the highest point immediately before the hot inlet to the pump

 

[nabby68]

what does the manual vent do?

 

[wonderb0y]

if it's going to be in your loft, and the same height or higher than your tank, then you will require a negative head pump.

a manual air vent lets any air out of the pipes which can cause problems with pumps.

 

[Bamber gaspipe]

what does the manual vent do?

It allows you to expel any air in your Hot pipework up to the pump at the highest point. Being a gravity fed system air will always be drawn in & needs to be expelled. What better place than the highest point in your system. ie the loft, just before the pump.

But then...I think you already know that. next question.

 

[nabby68]

ok, i have installed my shower pump and fitted a surrey flange which is fitted directly to the top of the cylinder with two outlets, one to the shower pump and the other to the expansion pipe. the problem now is that after the shower has been running for approx 6 mins the pump starts to struggle and the hot water pressure at the shower head drops dramatically. am i overunning my supply? and as some of you may be aware a surrey flange has a long copper tube about 6 in long which sits directly into my hw cylinder, could it be that the water level in my cylinder is dropping below the tube on the flange causing air to enter the pump?

 

[nabby68]

bump

 

[nabby68]

any help please fellas

 

[namsag]

Check your storage tank is filling properly you may have an old ball valve that is not letting enough water through it

 

[scaby]

what size is the cold feed pipe? and which way round did you connect the surrey flange?

 

[nabby68]

Check your storage tank is filling properly you may have an old ball valve that is not letting enough water through it

the storage tank is filling fine, i was monitoring it when the pump was working

what size is the cold feed pipe? and which way round did you connect the surrey flange?

the cold feed is in 22mm and i connected the pump feed to the inlet on the flange which siphons out the air and the DHW to the other inlet

 

[nabby68]

any help please

 

[Timmyturtle]

You did run a seperate cold feed directly from the tank to the pump?

And didnt tee off an existing cold or cold feed to cylinder

Does the ballvalve keep the water level fairly level when the shower running ?

If it dosn`t it may be not enough head of water to supply the pump when the level drops

The cylinder is constantly topped up from the tank in the loft so no air will get in...only cold water (ready to be heated)