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Archive for September 9th, 2009

Slow Leak Detector: Tissue Paper

Tissue-paper leak detector

Tissue-paper leak detector

When you make a plumbing joint with screwed compression fittings, there’s always a question of whether you’ve tightened the nut enough to make a good seal. The fittings come with copious warnings to not overtighten the nuts, which means I tend to undertighten them.

It’s easy to spot a major leak or a trickle, but what about a very slow ooze on a hot water line where the drip will evaporate before you notice?

Fold up a piece of tissue paper and secure it around the joint with a wire tie. Come back a few minutes / hours / days later: it’s easy to tell if the tissue has ever been wet, because its texture will be dramatically different.

Having just replaced a water heater, the subject of leakage is a hot topic around here…

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