As the others have said, it could easily be the lack of mains pressure because the lack of drop from the local reservoir tank or small pipe diameter connecting to the mains, leak in the pipe in the garden somewhere (although that would show up pretty clearly at the mo).
If the pressure varies during the day then basically its the mains pressure that's the prob.
When the house i'm in was built a 25mm connection was standard for it. If you built it today it needs a 32mm connection because the pressure has dropped (council turned the pressure down as it was easier than finding all the leaks in the public system.
Bookmarks