We use minimum 85% RO water and anti-freeze (ethylene glycol), leaving a 10% air gap for expansion. for more information on Reverse Osmosis please click here (Wikipedia) Tested For BS EN442...
We use minimum 85% RO water and anti-freeze (ethylene glycol), leaving a 10% air gap for expansion. for more information on Reverse Osmosis please click here (Wikipedia) Tested For BS EN442 Standards...