Water Pressure Problems in new house

Chewbacca_3

I've just had the water company out and theres a problem with water pressure. There is plenty of pressure upto the interior supply line (where there responsibility ends). In house there is only 5 litres per minute water pressure. What we can't understand is that theres no apparent internal stopcock except for the top floor of the house which we can isolate, but to turn the full supply of we have to go outside to isolate. Now we are on a water meter (outside) and theres a water meter inside but the inside one isn't in operating and the stop !!!! there doesn't isolate anything despite being on the ground floor (we live in a 2 floor flat over a shop). Could the pipes be blocked? are there some simple things we can try to remedy the situation? what should we be looking to do?. If we have to replace the supply we will have to dig up the ground in front of the shop and reklay the supply which could cost us thousands I would imagine, Any advice greatfully recieved and thanks in anticipation, I may well be able to provide more info when I know more about how our system works.

Many thanks

Mikeyorks

I presume the water people did a basic check that there is no evidence of a leak from the 'interior supply pipe' where it remains in the ground? (they can listen - or check the external meter for activity, with no taps etc on inside). If that's the case the supply is unlikely to be 'blocked'.

Except - I would be very suspicious of the internal meter that isn't operating. If that's in your supply line - it could be that the impeller is stuck and restricting the flow. Second suspicion would then focus on the stopcock alongside (?) it. If it doesn't appear to turn anything off - it could be that the jumper (the bit that sits in the pipe - but lifts by water pressure as you turn it on) is stuck in the nearly closed position.

But you first need to track the route of your supply line? If the meter / stopcock are in it - I'd focus there. If not - see if there are any other less obvious devices in the mains pipe from the external meter - to your flat.