DROP IN SHOWER FLOW/PRESSURE from Indirect Unvented Cylinder

[60bowens]

Hi
We had installed Indirect Unvented Cylinder(300L CentreStore) 3 years ago,as we had poor shower head pressure/flow with our Combi Boiler.
Lately we feel the shower flow or pressure has reduced.Previously we could run two or more showers/tap at same time,but nowadays once we have a tap open downstairs the shower flow reduces to a trickle.
What could possibly be the reason?
We get the combi-boiler and the Cylinder serviced annually and it is not due for another 4 months.
Any ideas?
Many Thanks

 

[ShaunCorbs]

You noticed any change in your mains pressure?

 

[townfanjon]

Has the cold mains flow and pressure altered at the kitchen tap , i.e road been up , new houses close by etc etc

 

[townfanjon]

You noticed any change in your mains pressure?

Pfffttttt

 

[60bowens]

no,the mains pressure hasn't decreased.
may I add that we noticed it more after coming back from holiday(shutting off the combi boiler for 10 days)

 

[ShaunCorbs]

Could be the inlet filter is blocked if you can manage until it's serviced tell them then if you can't call them out next week etc