Shower pump or valve problem

[breezer76]

i have just fitted a new shower pump, like for like with the old one but it wont kick in. i did all the commissioning stuff and still no luck. i then checked for air locks, very little water coming through the valve but good pressure to the valve when i disconnected the pipes to the valve.Is it the valve thats likely to be the problem rather than the pump?

 

[seco services]

whats the flow like from the valve under gravity no pump running ?

 

[breezer76]

its rubbish, took shower hose off and it just trickles out but theres good flow to the valve.

 

[seco services]

is it both hot/cold or just one that reduced ?

check the shower filters.

 

[breezer76]

both, ive checked filters valve and pump side all clear.

 

[seco services]

what shower mixer is it ?
apart from the filters in the mixer the only other thing is the check valves
but then i wouldn't suspect bothsides to be stuck.

you say flow to the mixer is ok ?

 

[breezer76]

its a sirrus stratus, approx 7yrs old. i disconnected the hot and cold from the valve and the pressure was pretty good.

 

[seco services]

you not got a blockage on the hose outlet at all.
seems strange you say you have pressure to the mixer but nothing out on both hot/cold.

 

[breezer76]

i dont think so, had a look and felt inside no gunk etc and some water is coming out but nothing compared to what is going in or not as the problem seems!

 

[seco services]

the shower controls all working as they should ?
as in the flow control valve opening and shutting.

 

[breezer76]

yeah it seems to be.

 

[seco services]

i can only think the flow adjuster inside is getting stuck not opening fully.

 

[breezer76]

how do i overcome that problem/or check. new parts/valve or strip down etc?

 

[seco services]

useally a strip down and a service kit (seals etc)

only going on what you say flow etc to shower but nothing through shower
you've checked filters, all isolations are open fully.

 

[breezer76]

ok thanks for your help