John Jackson

Hi All, Thank you for your responses. It's a new build house so will need to pass Building Control. I quite like the simple chlorination idea but doubt the BCO would wear it as it would need regular attention. I appreciate that many cold water tanks live in warm loft spaces in the summer but again, I think BC may have something to say about it living within the warm envelope. It will have to meet WRAS standards and I know that constantly above 20 degrees won't cut it. As for the pressure vessel idea, I think it's no different to a tank in the loft, it's just a different type of tank. Mmmm. I think this needs a bit more thinking about.

Hi Marvin, thank you. Is yours a warm loft? John

Hello everyone. I would like to ask your advice. I have a 7500ltr underground rainwater harvesting and attenuation tank installed in the garden of my self-build. My initial intent was to pump water into a large header tank in my loft space, controlled by float switches, to feed toilet cisterns and washing machine. However, I’ve just realised that my locating a header tank in my loft may not be a good idea as the loft is within the insulated building envelope and will therefore sit at about 20 to 25 degrees C. These are apparently ideal conditions for Legionella formation. The reason for the header tank was to minimise pump cycling to prolong the life of the pump. Has anyone else come across this issue or worked out a sensible fix? Thank you, John