guide

Why is my water pressure low?

Low water pressure can affect one tap or the whole house. This guide explains the common causes and the safe checks you can make before arranging help.

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Is it one tap or the whole house?

Check several taps. A problem at a single tap usually points to that tap or its supply, while low pressure everywhere points to something affecting the whole property or the incoming supply.

Common causes

A partly closed stopcock or isolation valve.
A blocked or limescale-clogged tap aerator or shower head.
A shared supply being used elsewhere at the same time.
A supply issue from the water company or in the street.
Airlocks or issues within the plumbing or heating system.

Safe checks you can make

Make sure your internal stopcock is fully open.
Clean or descale a tap aerator or shower head where you can do so safely.
Ask neighbours whether they also have low pressure, which can indicate a supply issue.
Check your water supplier's website for reported issues in your area.

When to call a professional

If pressure stays low after these checks, drops suddenly, or affects a combi boiler's performance, a plumber can investigate valves, pipework and any hidden leaks safely.

Plumbing repair enquiries in Carlisle

Request help with domestic plumbing repairs in Carlisle, from dripping taps and running toilets to leaking pipework and faulty valves.

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Leak detection enquiries in Carlisle

Request help investigating visible or hidden water leaks in Carlisle, with practical signs to record before contacting a provider.

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Questions

Frequently asked questions

Can a leak cause low water pressure?

Yes. A hidden leak can reduce pressure and often shows up as damp patches or an unexpectedly high water bill. A plumber can trace and confirm the source.

Why does my shower lose pressure when another tap runs?

Some systems share flow between outlets, so using two at once lowers pressure. If it is severe or new, it is worth having the system checked.