Question 1

Can you replace a stopcock that will not turn?

Accepted Answer

Yes, where the valve and adjoining pipework are accessible and the incoming water supply can be isolated safely. The available upstream isolation point must be established before the existing stopcock is removed.

Question 2

Should I force a seized stopcock?

Accepted Answer

No. Excessive force can damage the handle, spindle, valve body or surrounding pipework. A seized valve should be inspected before further attempts are made to operate it.

Question 3

Can you replace a leaking isolation valve beneath a sink?

Accepted Answer

Yes, accessible isolation valves serving taps, appliances and other individual fixtures can be assessed and replaced where appropriate.

Question 4

Can you install isolation valves for individual taps?

Accepted Answer

In many situations, yes. This depends on the available access, pipe material, space and existing plumbing arrangement.

Question 5

Who is responsible for the external stop valve?

Accepted Answer

Responsibility depends on its location and the water-supply arrangement. An external valve in the street or pavement may be controlled by the water supplier, while valves inside communal buildings may be managed by the freeholder or building management.

Question 6

What happens if the external stop valve does not work?

Accepted Answer

The water supplier, freeholder or building management may need to repair or provide access to the upstream isolation point before the internal main stopcock can be replaced safely.

Question 7

Can you replace valves on older lead pipework?

Accepted Answer

Older lead supplies require careful individual assessment. The pipe condition, available access and correct transition fitting must be established before work can be recommended.

Question 8

What photographs should I send?

Accepted Answer

Send a clear close-up of the valve, a wider photograph showing its location and photographs of the adjoining pipework. Include your postcode and explain whether the valve is seized, leaking or failing to stop the water.

Frequently asked questions