They are good... Possibly too good as they will detect traces lingering on pipework/hoses/surrounding materials etc
Away from the actual source of the leak....
UV dye/and or bubble type sprays are the most reliable and accurate way of leak finding IMHO.
We have just had an auto-changeover valve fitted on the cottage cylinders. You leave it set to one cylinder & when that runs out it pulls from the other one but shows a red marker to tell you that tank is empty. Then you swap the tank & switch it to the other tank & wait for the red marker again. That way you only have to check every so often & will know if one tank has run out.
Last edited by Sharon the Cat; 11-02-2019 at 10:07. Reason: typo
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