Discuss Brown hot water in the Central Heating Forum at Plumbers Forums; I replaced my hot water tank about a year ago. The original one had been installed when the house was built in 1957 and had started to leak. It is ...
I replaced my hot water tank about a year ago. The original one had been installed when the house was built in 1957 and had started to leak. It is an all in one indirect unit that supplies hot water to the radiators and the hot running water. It has one cold water feed unlike a true indirect system that uses two cold water feeds. I am no expert but i believe the tap water and radiator water is separated by some sort of air lock.
The problem arises when the hot water and heating are on together. The hot water is very rusty coloured and you have to run off a whole tank full of hot water before the next tank is clear. This happens everytime. If only the hot water is on without the heating everything is fine. I wouldn't of thought the hot water tank is corroded just after a year.
Please help with any advise.
Hi. Just a thought re:- primatic cylinders were in general fitted to back boiler gravity type installations to protect the boilers from corrosion, being a cheap alternative to an indirect system. However they do not cope well with pumped systems. It could be the reason the air lock has been effected? Good Luck
I think we have established the air bubble has burst, i would look at why,the overall problem will be the temperature of the circs going through the cylinder, either the pump or circulator has malfunction or the thermostat(s) may be defective