Power Shower Problem

[kevski]

I have a power shower fed by a Monsoon 3.0 bar Twin pump, the pump is around 4 years old and the shower has always worked okay until the last couple of days. Water out comes out normally when the shower is first turned on but after a few minutes it reduces until there is just a trickle coming out, the pump keeps going as normal. Has anybody any ideas what could be the problem.
Regards
kevski

 

[Technotim]

Strange does this still happen when you turn the shower valve to cold ?
if yes obvious one check cold storage tank has water, could be muck in the inlet.

 

[crispage]

Airlocked I presume.

 

[JPC]

anything dropped into your tank in the loft...like insulation or similar...causing a "floating" blockage

 

[seco services]

what like a turd.

 

[JPC]

made me laugh...

i have had it though