Shower pressure is very low and is luke warm!

[jmwollny]

I have just has a loft conversion done. The new shower room was fitted with a thermostatic shower. The plumber fitted a negative head 2.2 bar Salamander pump downstairs next to the hot water tank.

I am experiencing a few problems :

1. The shower pressure is not very high
2. The shower is not hot, the Grohe shower says that it is limited to 41 degrees but the water seems cooler than that
3. Sometimes when turing on the basin hot tap it runs for a little while then becomes a trickle. All the time I can hear the pump running downstairs

Any help would be greatly appreciated. The plumber is saying that it is not his problem and that he has installed the pump and shower correctly. Is the pump faulty or is there another issue?

Thanks in advance.

 

[tincup]

Hi

More info on the hot water source would help.

HTH

 

[jmwollny]

The heating system is powered by a condensing boiler. There is a large cold water tank which had been fitted into the eaves in one of the new loft rooms and there is also a smaller water tank which has been fitted just below the ceiling in the same room.

Downstairs in the airing cupboard there is a hot water cylinder and the new shower pump. The new pipes have been routed up through the ceiling and into the new bathroom which is directly above the hot water cylinder. Hope this helps.

 

[seco services]

are the cold taps run from the pump aswell ?

 

[jmwollny]

The pump has inlets/outlets for hot and cold so I guess it does. The pump details are here http://www.salamanderpumps.co.uk/Products/ESP_Pumps.htm. It's the 75 CPV twin model.

In case this matters, the cold water pressure is fine.

 

[seco services]

if the pump kicks in when you run the hot/cold upstairs and they are running fine and the shower is still only a trickle then i would check the filters in the shower.

 

[neds]

Those Thermostatic showers can sometimes be too clever for its own good.

 

[Goldspoon]

The plumber is saying that it is not his problem and that he has installed the pump and shower correctly.

Your plumber sounds such a helpful chap...

 

[jmwollny]

I've just had a look a the technical manual for the Grohe shower. You guys could be right. I'll check ther filters, maybe some debris has got lodged there.

It also says in the manual that the temperature can be adjusted and that the difference in pressure between hot and cold can be equalised through the installation of a flow limiter. I will double check that it has been fitted correctly.

And I just thought a shower mixer was just that...