The Welch plug, (misnomer: Welsh plug), is a thin, domed disc or dish, of a metallic alloy, which is pressed, convex side out, into a casting hole and against an internal shoulder. Alternatively a non-ferrous metal such as I.D. Hole Size: 1.210" [30.734 mm] to 1.331" [33.807 mm], Max Air Pressure: Up to 10 PSI, Hardware: brass handle with zinc-plated steel body, Rubber: Neoprene

I.D. Hole Size: 0.719" [18.263 mm] to 0.791" [20.089 mm], Max Air Pressure: Up to 10 PSI, Hardware: brass handle with stainless steel body, Rubber: Neoprene I.D. Hole Size: 2.310" [58.67 mm] to 2.564" [65.13 mm], Max Air Pressure: Up to 5 PSI, Hardware: brass handle with zinc-plated steel body, Rubber: Neoprene I.D. Hole Size: 1.920" [49.022 mm] to 2.142" [54.414 mm], Max Air Pressure: Up to 5 PSI, Hardware: ALL Stainless Steel, Rubber: NeopreneI.D. Hole Size: 2.470" [62.74 mm] to 2.742" [69.64 mm], Max Air Pressure: Up to 5 PSI, Hardware: brass handle with zinc-plated steel body, Rubber: Buna-Nitrile I.D. Hole Size: 1.060" [26.924 mm] to 1.166" [29.616 mm], Max Air Pressure: Up to 10 PSI, Hardware: brass handle with zinc-plated steel body, Rubber: Neoprene At least some of the " numbered" (1, 2, 3) Permatex are non-hardening, so when the tube leaked 10 years ago and made a mess it is still a smeary mess today.

I.D. Hole Size: 0.937" [23.80 mm] to 1.03" [26.18 mm], Max Air Pressure: Up to 10 PSI, Hardware: brass handle with zinc-plated steel body, Rubber: Neoprene

I.D. Hole Size: 3.690" [93.726 mm] to 4.096" [104.036 mm], Max Air Pressure: Up to 5 PSI, Hardware: brass handle with zinc-plated steel body, Rubber: Neoprene As the washers are compressed together, the rubber expands, ensuring a tight fit inside the diameter of the pipe. These detachable plugs offer a gas tight seal making it easy to change out a valve or fitting.

I.D. Hole Size: 1.440" [36.576 mm] to 1.584" [40.234 mm], Max Air Pressure: Up to 10 PSI, Hardware: brass handle with zinc-plated steel body, Rubber: Neoprene I.D. Hole Size: 2.060" [52.234 mm] to 2.287" [58.080 mm], Max Air Pressure: Up to 5 PSI, Hardware: brass handle with zinc-plated steel body, Rubber: NeopreneI.D. Hole Size: 1.440" [36.576 mm] to 1.584" [40.234 mm], Max Air Pressure: Up to 10 PSI, Hardware: ALL Stainless Steel, Rubber: Neoprene I.D. Hole Size: 1.630" [41.40 mm] to 1.793" [45.54 mm], Max Air Pressure: Up to 5 PSI, Hardware: brass handle with zinc-plated steel body, Rubber: Neoprene I.D. Hole Size: 2.920" [74.168 mm] to 3.241" [82.326 mm], Max Air Pressure: Up to 5 PSI, Hardware: brass handle with zinc-plated steel body, Rubber: Neoprene I.D. Hole Size: 2.630" [66.802 mm] to 2.919" [74.150 mm], Max Air Pressure: Up to 5 PSI, Hardware: brass handle with zinc-plated steel body, Rubber: Neoprene I.D. Hole Size: 0.719" [18.26 mm] to 0.791" [20.09 mm], Max Air Pressure: Up to 10 PSI, Hardware: brass handle with zinc-plated steel body, Rubber: Neoprene

I.D. Hole Size: 2.920" [74.168 mm] to 3.241" [82.326 mm], Max Air Pressure: Up to 5 PSI, Hardware: ALL Stainless Steel, Rubber: Neoprene I.D. Hole Size: 0.937" [23.800 mm] to 1.031" [26.180 mm], Max Air Pressure: Up to 10 PSI, Hardware: brass handle with zinc-plated steel body, Rubber: Neoprene I.D. Hole Size: 2.220" [56.388 mm] to 2.464" [62.591 mm], Max Air Pressure: Up to 5 PSI, Hardware: brass handle with zinc-plated steel body, Rubber: Neoprene

FAQ

I.D. Hole Size: 1.550" [39.370 mm] to 1.705" [43.307 mm], Max Air Pressure: Up to 10 PSI, Hardware: ALL Stainless Steel, Rubber: Neoprene I.D. Hole Size: 1.810" [45.974 mm] to 1.991" [50.571 mm], Max Air Pressure: Up to 5 PSI, Hardware: brass handle with zinc-plated steel body, Rubber: Neoprene I.D. Hole Size: 1.380" [35.05 mm] to 1.518" [38.56 mm], Max Air Pressure: Up to 5 PSI, Hardware: brass handle with zinc-plated steel body, Rubber: Neoprene There are different types of plugs on the market. The plugs are usually thin metal cups press fitted into the casting holes, but may be made of rubber or other materials. In