Hi everyone,
I am new to this site so I hope I am posting on the correct forum. I just bought a house with u8nderfloor heating serviced with a Vaillant Echotec plus boiler. It is a pressurised system (no tanks in the loft) but it has a stainless hot water cylinder so it is not a combi boiler heating hot water direct from the mains. The house was built 11 years ago so I guess everything is that old. As background, I have just replaced a faulty pressure vessel in the boiler (I was slowly losing pressure and water came out when I checked the shraeder valve) and that problem now seems solved. I am a competent DIYer and not a plumber by trade though I did install a complete central heating system in my previous house.
The problem I have is about 0.5 litres of water comes out of an outside overflow pipe when the shower is used and is running for 5 minutes or so. As I did not have the house built and the majority of the pipework is underfloor or boxed in, I am uncertain where the source of the overflow pipe is. Anyone got any ideas as to what the problem is likely to be. I suspect the overflow pipe also discharges water if a hot tap in a sink is left running for several minutes but I have not yet checked this.
When hot water is drawn off from the system and cold water from the mains replenishes it, I am guessing there is some sort of pressure increase that may activate a pressure release valve somewhere in the system but this is only a guess. Any ideas and help will be greatly appreciated and thanks in advance to anyone who can help
I am new to this site so I hope I am posting on the correct forum. I just bought a house with u8nderfloor heating serviced with a Vaillant Echotec plus boiler. It is a pressurised system (no tanks in the loft) but it has a stainless hot water cylinder so it is not a combi boiler heating hot water direct from the mains. The house was built 11 years ago so I guess everything is that old. As background, I have just replaced a faulty pressure vessel in the boiler (I was slowly losing pressure and water came out when I checked the shraeder valve) and that problem now seems solved. I am a competent DIYer and not a plumber by trade though I did install a complete central heating system in my previous house.
The problem I have is about 0.5 litres of water comes out of an outside overflow pipe when the shower is used and is running for 5 minutes or so. As I did not have the house built and the majority of the pipework is underfloor or boxed in, I am uncertain where the source of the overflow pipe is. Anyone got any ideas as to what the problem is likely to be. I suspect the overflow pipe also discharges water if a hot tap in a sink is left running for several minutes but I have not yet checked this.
When hot water is drawn off from the system and cold water from the mains replenishes it, I am guessing there is some sort of pressure increase that may activate a pressure release valve somewhere in the system but this is only a guess. Any ideas and help will be greatly appreciated and thanks in advance to anyone who can help
