3mirrors Silicone Purge Plugs Kit - 14-Piece Back Purging Set for Welding (0.9-4.0 in) with 5m Hose

Optimize TIG welding with a complete purge plug kit

The 3mirrors Silicone Purge Plugs Kit is a 14-piece, color-coded back purging solution designed to fit a wide range of tube diameters. The flexible silicone tolerates heat up to 600 F, maintaining its shape and seal under typical workshop conditions. The included 5 m hose ensures you have ready access to inert gas, while the rugged case keeps everything organized for on-site projects.

What’s included

• Seven size ranges covering 0.9-4.0 in, with orange and blue pairs for fast size recognition
• 5 m ISO 3821:2019 purge hose
• Sturdy storage case for transport and organization

Material and durability

The plugs are crafted from non-toxic high-temperature silicone. They stay flexible enough to seal irregular surfaces and fit both threaded and non-threaded holes. They resist rupture, shrinkage, or cracking under typical welding conditions, making them reusable as part of your workflow.

• Flexible silicone adapts to pipe diameters and rough surfaces
• Strong sealing and compatibility with various hole types
• Durable design supports repeated use without loss of performance

Performance in back purging

Inside the plugs, a stainless steel filter screen helps reduce turbulence and improve inert gas flooding. This design supports shield gas coverage around the weld root, which can help protect the backside of the weld from oxidation when purging stainless steel sleeves and pipelines.

Using the included sleeves, you can transfer a plug easily from one size to another, simplifying setup and removal on busy shop floors or remote sites.

Practical usage and tips

• Check diameter compatibility before selecting a plug size
• Attach the hose and verify seating for a tight seal
• Store the kit in the case between uses to preserve flexibility
• Color-coded orange/blue pairs speed size changes on site

If you have questions or need assistance selecting the right size, contact our team—we typically respond within 24 hours.