fixmyplumbing

Simple explanations for plumbing problems

Filling loop passing when closed

The valves on the filling loop should be closed, the metal braided filling loop removed and the valves capped.  The majority of people don’t do this so there is always a chance that the valves can be opened accidentally or be faulty.  This can allow too much pressure to develop in the system which may cause the metal pipe near the boiler to overflow.

If the valves are closed and the pressure is still going up it can be the filling loop valves failing to close properly. Listen closely to the valve if you can hear water flowing with the valves turned off the valves have failed and will need to be changed. If you can’t hear water flowing and are confident in your abilities remove the filling loop and see if any water is flowing.  Even a slight drip from the side attached to the mains can be enough to raise the pressure over a long period of time.

If they are passing or even dripping the valves should be changed.

The filling loop below is open

IMG_5654

The filling loop below is closed.

IMG_5653

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