LA-CO Sure-Chek 32850 Blue Green Liquid Fluorescent Gas Leak Detector, 1 pt Trigger Spray Bottle

Specially formulated to work within a broad temperature range, sure-chek leak detector can be used on CSST systems in many climates. It doesn't contain chlorides, so it won't damage metal pipe. Simply spray it on gas line connections and any leaks will be seen with sure-chek's highly visible fluorescent bubbles.