Despite turning off the water at the mains it still continues to leak which makes me wonder whether it is a pipe for the central heating system which was installed after the house was built. There are numerous pipes connected all under the floor, some to the hot water immersion tank. The water is black which might confirm this. I have temporarily plugged it with one of your subscribers suggestions i.e a toothpick but will find it difficult to plug it wither rubber clamps etc if it is still wet.Any suggestions other than calling in a plumber.
