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masseyshaw...
masseyshaw...

Posted: Sat Mar 27, 2021 2:06pm

Post Subject: Sterilising boat water tank

Having just bought my boat I want to sterilise the water tank (160 gallon) I'd like to use milton (tablets or fluid) but could you advise what kind of quantity I would need to put in and how long to leave it.

Tony-B...
Tony-B...

Posted: Sat Mar 27, 2021 4:00pm

Post Subject: Sterilising boat water tank

The instructions re the dilution rate will be on the bottle or box but you might have to work it out for your tank capacity. I can not counter the manufacturer's advice. The ratio does not seem to be exact or that easy to find, especially as the chlorine content of a sterilant may vary but one site I found via Google said 50 to 100 parts per million. Are you aware that cheap THIN bleach is the same sterilant? You don't want a thickened or perfumed one so cheapest is best. The following is not a recommendation and if you do it please verify what I say first. On my boat I emptied the tank, poured in one or toe bottles of cheap bleach and filled with water. Then I ran water from all the taps until I could smell the chlorine and let it stand for several hours or overnight. Then pump t all out and refill with fresh water. The water may still have a taint and if so drain and fill again, but often the supply from the tap has a noticeable chlorine smell.

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