What test pressure should I use?

The rule is to test above working pressure; the exact figure and duration come from the system specification and local regulations.

Water, on plumbing systems. Water does not compress, which makes the test both safer and more accurate; air stores energy and hides small leaks.

Does falling pressure always mean a leak?

No. New plastic pipe expands and temperature change moves the reading. Keep temperature steady through the test and compare the drop against the acceptance criterion.

Can the pump fill the line as well?

Yes. Tank models fill and then pressurise; the electric model does it markedly faster.

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Pressure Test Pumps

A test pump proves a finished installation tight by holding it under pressure. This page lists 50 and 100 bar hand pumps and a 40 bar electric model, with 5-10 litre tanks and 1/2″-3/8″ connections.

How a pressure test is run

The line is filled with water and all air vented first; air compresses and drops the pressure misleadingly. The pump then takes the line above working pressure and the gauge is watched for a set period.

A fall in pressure indicates a leak — but not every fall is one: newly laid plastic pipe expands slightly and a change in temperature moves the pressure too. Test duration and acceptance criteria come from the system's specification.

Hand or electric?

A hand pump is standard on domestic and small commercial work: no power needed, it feeds from its own tank and raises pressure in steps on the lever. 50 bar covers most plumbing; 100 bar models are for heating and higher pressure lines.

The electric model saves time on long runs and large volumes, filling and pressurising without the lever. Flow rate and maximum pressure are stated on the product page.

Frequently Asked Questions

What test pressure should I use?
The rule is to test above working pressure; the exact figure and duration come from the system specification and local regulations.
Water or air?
Water, on plumbing systems. Water does not compress, which makes the test both safer and more accurate; air stores energy and hides small leaks.
Does falling pressure always mean a leak?
No. New plastic pipe expands and temperature change moves the reading. Keep temperature steady through the test and compare the drop against the acceptance criterion.
Can the pump fill the line as well?
Yes. Tank models fill and then pressurise; the electric model does it markedly faster.