Can someone please tell me if it is legal to have the pressure release pipe from a combi boiler attached to the waste pipe from a bathroom sink? I am getting conflicting information. Some say it is ok others say it must terminate through an exterior wall. HELP please. :?
The safety valve discharge pipe should terminate outside the building facing downward. This is to avoid possile boiling water creating a danger or nuisance. However, it should be located in an easily visable position.
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