Why wouldn't it be ok.....it's pure and it's in a tank inside your van in Winter.....unless you put something in it it is still pure.I keep 3 x 25 litre barrels as spare in garage and that sometimes sits there for a couple of months but still reads 0.
Use your tds meter if you still have one.
Quote from: dd on February 04, 2025, 05:17:15 pmUse your tds meter if you still have one.I just ordered a new TDS meter as it's broken, mind you I've had it over 20 years