When hot is ‘too hot’

Canal Boat - - Back Cabin: - TONY REPLIES… ALAN FRANKLIN, via CB’s

QI have re­cently bought a boat built by Cole­craft in 2008. I heat the wa­ter ei­ther by run­ning the en­gine, or light­ing the multi-fuel burner with back boiler, but the wa­ter comes out ex­tremely hot. How can I lower the tem­per­a­ture?


You can buy ther­mo­static mix­ing valves that are plumbed into the hot ‘out of the calori­fier’ pipe and they mix a cer­tain amount of cold wa­ter with the hot to keep the tem­per­a­ture safe. They are avail­able from plumbers’ mer­chants as ei­ther a fixed out­let tem­per­a­ture or vari­able, but take care to keep the wa­ter above about 55C to in­hibit the growth of Le­gionella bac­te­ria.

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