OATEY 30209 8 oz. All Purpose Leak Detector With Dauber

Yes. The Oatey 30209 all purpose leak detector is made for refrigeration lines and can be used on all types of tubing, valves, cylinders, pressure tanks and other systems under oxygen pressure. It's a liquid bubble-test solution, so you brush it on a joint under pressure and watch for bubbles at the leak.

Working range on the Oatey 30209 runs from -55 F to 160 F, and it keeps working in sub-zero temperatures. That covers a winter rooftop gas check or a walk-in cooler line as well as a hot mechanical room, so it won't freeze solid on you the way a water-and-soap mix does.

No. The 30209 uses a high-viscosity formula that clings to vertical surfaces, and it has a slow evaporation rate that extends inspection time. That matters on overhead and vertical work where a thin soap solution sheets off the joint before a slow leak has time to form a bubble.

It's non-toxic and will not stain, so it can be used on exposed piping in occupied units, finished mechanical closets, or above ceilings without leaving a mark on the surrounding surfaces.

A bubble solution like the Oatey 30209 is what you use to pinpoint a leak once you already know the system is losing pressure, or to prove out every joint after a braze or a thread-up. It works on any accessible joint and needs no calibration or batteries. An electronic sniffer is the better tool for finding a leak you can't localize, or for a joint you can't physically reach to swab. Most techs carry both and use the solution for verification because it shows you exactly which fitting is bubbling.

Order Oatey 30209. That is the 8 oz all purpose leak detector with the dauber cap, and it's the only configuration for this model. Net weight comes in at 0.671 lb for the filled bottle.