Yeah, I've heard the tissue paper thing but it's a rad valve so tissue paper would dry immediately from the heat of the rad / pipe. Need something that changes colour then stays that colour, like....
bingo
is it touch to wet? you'll usually see the piping change colour, otherwise pour some perfume/aftershave into the system.
@dbr started
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Yeah, I've heard the tissue paper thing but it's a rad valve so tissue paper would dry immediately from the heat of the rad / pipe. Need something that changes colour then stays that colour, like....
bingo