Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws
Discuss Fortic tank is overflowing in the General DIY Plumbing Forum area at Plumbers Forums
No nothing new other than new ballcock which was told was the problem.
Back pressure happening somewhere could be the cause. Basically cold pushing hot out of the way. Turn main stopcock off and see if overflow stops.
No. Only mixer are taps on kitchen sink. Wondering if that can cause issue.can crossover happen within body?
Thanks. No-one seems to say thermostat is the problem which is what plumber said needed replacing. Will try main stopcock.
That’s because a thermostat is an electrical rod that enters the immersion heater assembly, naff all to do with any form of additional water. This isn’t your setup, but the image is simple enough to understand, where it states heater coil is where the thermostat would sit:
Thanks. That was my thoughts. I assumed if water was overheating cos of stat then it would come through vent pipe not as is. So for some reason increased volume in tank as you say.
