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Shower hot water lasts 10-15 seconds
I’m in a quandary here, so please help me if you can. It seems that the hot water in my ground floor powder room, shower and second floor shower gets hot for 10-15 seconds that gradually gets cold. I’ve changed the mixer cartridge in each shower, I’ve turned up the heat setting on my boiler and still no improvement. Does anyone now what could possibly be the culprit? The pipes on my boiler are very warm so there is adequate flow in and out, but the hot water just doesn’t last. I’m thinking it may be the valve on the boiler now, but if the out flow is hot then I’m not so sure. The pressure on the boiler is within range as well. Any help is greatly appreciated.