Hi...Hope somebody can help me? The small copper pipe on the back of the house is leaking water (steady stream). This happened before (about a year ago) when there was a buildup of hot water in the house - I lowered the heating and it stopped. I did the same this time just in case it was the same problem however this time it hasn't stopped the flow of water. Does anybody know how I could resolve it - I have switched the heating off completely at the moment to see if this has any effect. Could it be related to the safety valve in the hotpress - Apologies for the laymans terms and the lack of knowledge in general! The valve has a small red plastic piece in top - should this be tightened and could this be related? I'm at a loss....Any help appreciated. By the way, have called a plumber twice but have been let down - so just seeing if this is something I could sort myself? Many Thanks.....