Not sure I can see why you would want to, and seems pointless as in a typical system only half the system (the boiler/hot pipes only) would be affected if there was any benefit! The cold pipes which are perhaps the greater risk to health as cold water likely to be used for drinking, cooking, teeth cleaning etc. would only be treated with cold water as per Puriclean normal use instructions!
Perhaps the best people to ask are Puriclean manufacturers, as I'm not sure there are any chemists amongst us that would have the technical knowledge to know the effects of the chemicals (AFAIK it's Chlorine dioxide) at elevated temperatures on the system, or for that matter the effects on the chemicals of heating them (chemicals can change/break down under heating!)! - you may say that you would only want 'warm' water, but in the boiler the water in direct contact with the heating element WILL be raised to much higher temps, it's only when that 'hot' water mixes with the surrounding colder water do you end up with an 'averaged out' warm tank of water!
Hi and welcome to the forum. As long as it's only 'warm' I don't forsee a problem, it is often mixed in warm water to help any bits desolve better before adding it to your aquaroll. It is mainly used with cold water but if in any doubt you could give the manufacturer a ring on 01728 603990
or email them here:- info at cleantabs.co.uk (just insert the at sign instead)
Dave.
------------- Give a man a fish and he will eat for a day,
Teach a man to fish and you can get rid of him for a whole weekend.
If you look at the directions for use on the exterior of the Puriclean container it tells you only to use warm water for one particular application which is for cleaning glassware, cutlery, crockery, tableware and vacuum flasks which requires 3 times the normal dosage of powder anyway in comparison to sterilising water systems. These products have been tested in a laboratory so my advice is to adhere to the instructions and use cold water as instructed as warm water could have an impact regarding destroying the elements that destroy the bio-film.
I have always mixed Puriclean with warm water (just a little to get it thoroughly disolved) then added cold water. Fill the system with this now very cool mix, leave to stand a short time, then drain and flush with clear cold water.
The water smells a bit when first starting to use the caravan, but soon goes off.
My hot water (like most others) is a branch off the cold water system, so if 'cleaning the whole system it will get in the boiler anyway, I wouldn't turn the boiler on to heat though, just open the taps and start the pump. been using Puriclean for years without issue. I normally flush the whole system out a couple of times afterwards
------------- Regards
Johno
VP and Librarian of the Renault Trafic MK1 Owners group
Been Motorhoming for nearly 30 years, have never used puriclean (or equivalent), never been poorly from dirty water. But we boil all the water we use for cooking or coffees etc, and fill water canisters from the site taps for plain drinking water. Our water tank is emptied on most trips because we only fill it to 50%. Bicarb of soda plus a slug of White vinegar to foam it, flushed away with a kettle of hot water, keeps the drains sweet.