DIY How To

Direct Cold Water System

There are two types of cold water systems, direct or indirect. Certain areas of the country have used different systems at different times.

Direct cold water systems


In a direct system all the cold water taps and wc cistern are fed off the rising main, the main advantages being that suitable drinking water is available from every cold tap and there is sufficient water pressure especially for electric showers.

The main disadvantage is a greater risk of contaminated water getting into the water main.

To check what system is in your home, isolate the water supply at your stop cock, if you don't know where it is, now is as good a time as any to find out.

When you have isolated the supply turn your bath and wash basin, cold water taps on. If after 10 seconds cold water continues to run then you have an indirect system, if the water has stopped you have a direct system.

Direct system

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