That’s Swagelok Snoop Liquid Leak Detector
What it’s used for:
Finding gas leaks in pipes, fittings, valves, tanks, and hoses. It’s the standard stuff AC technicians, plumbers, and gas engineers use.
How it works:
1. You apply the liquid with the squeeze bottle tip onto joints, welds, or connections you suspect are leaking.
2. If there’s a gas leak, the liquid will bubble up immediately — just like soap + water, but it’s specially formulated to be more sensitive and not damage metals.
3. No bubbles = no leak at that spot.