Hi,
Please could you help me?
I have an indirect hot water cylinder heated by a back boiler. I have removed the small cold water tank which was positioned directly above the cylinder, and have replaced it with a larger tank in the loft. When I moved the tank I also installed a pump and a power shower which is fed from a Surrey flange at the top of the hot water cylinder. The hot water vent pipe also comes out of the surrey flange and is rooted back to the cold water tank in the loft.
I understand that the vent pipe is supposed to run continually upwards to the cold water tank, however my vent pipe drops below the height of the cylinder and runs under the floor boards of the room, to the next one before it rises verticazlly to the cold water tank. What is the impact of this? I understand that if the boiler overheats the water in the hot water tank, steam will escape through the vent pipe. If the pipe goes down before it goes up, this may make it more difficult to escape, however it will still escape? Is it dangerous?
If it needs to change, is it ok to root the vent pipe directly upwards to a small plastic container which has an overflow through the outside wall directed into my grey water guttering? If so what is the minimum size of that container? The reason for me wanting to do this is that it is a much larger job to route the pipe differently to the loft and there is no way of doing it neatly and unabtrusively.
Thanks
An Engineer trying to learn plumbing diy
Please could you help me?
I have an indirect hot water cylinder heated by a back boiler. I have removed the small cold water tank which was positioned directly above the cylinder, and have replaced it with a larger tank in the loft. When I moved the tank I also installed a pump and a power shower which is fed from a Surrey flange at the top of the hot water cylinder. The hot water vent pipe also comes out of the surrey flange and is rooted back to the cold water tank in the loft.
I understand that the vent pipe is supposed to run continually upwards to the cold water tank, however my vent pipe drops below the height of the cylinder and runs under the floor boards of the room, to the next one before it rises verticazlly to the cold water tank. What is the impact of this? I understand that if the boiler overheats the water in the hot water tank, steam will escape through the vent pipe. If the pipe goes down before it goes up, this may make it more difficult to escape, however it will still escape? Is it dangerous?
If it needs to change, is it ok to root the vent pipe directly upwards to a small plastic container which has an overflow through the outside wall directed into my grey water guttering? If so what is the minimum size of that container? The reason for me wanting to do this is that it is a much larger job to route the pipe differently to the loft and there is no way of doing it neatly and unabtrusively.
Thanks
An Engineer trying to learn plumbing diy