Is it the whole house, or just one tap?
First, check a few taps around the home. If only one is weak, the issue is local to that tap — often a blocked aerator or a worn washer. If every outlet is down, read on: the cause is your incoming supply or your internal pipework.
The usual causes
A few things account for most whole-house cases: the stopcock not fully open (easily knocked after other work), a mains-supply issue at peak times or affecting the whole street, a pressure-reducing valve that’s failed, or old, furred-up pipework narrowing the flow in an older property.
Simple checks you can do
Make sure your internal stopcock is turned fully anti-clockwise (open). Ask a neighbour whether they’re affected too — if so, it’s likely the mains. And check whether it’s worse at busy times of day, which points to supply rather than your plumbing.
When to call a plumber
If the stopcock’s open, neighbours are fine, and it’s low all day, the cause is likely inside your system — a failed valve or restricted pipework — and that’s worth a proper look. We can find the restriction and put it right.
Low pressure across the whole house and can’t pin down why? If you’re in South Manchester or Cheshire, we’ll trace it — stopcock, valve or pipework — and get the flow back.
See our plumbing service
