1.25" SCH10 Purge Plug Kit

Designed and manufactured in-house by GizFab, our 1.25" SCH10 Purge Plug Kit provides a simple and reusable solution for backpurging tubular exhaust and turbo manifold components during TIG welding.

Developed specifically with manifold fabrication in mind, the plugs are designed to work with 1.25" SCH10 tube as well as both short and long radius elbows, making them ideal for purging individual manifold primaries, collectors and other fabricated sections.

Each kit contains four purge plugs, allowing multiple runners to be prepared at the same time and creating a much more efficient workflow when fabricating complete manifolds.

Key Features

• Designed & Manufactured In-House by GizFab
• Designed for 1.25" SCH10
• Suitable for Straight Tube
• Compatible with Short Radius Elbows
• Compatible with Long Radius Elbows
• Tool-Free Thumb Screw Retention
• Four Purge Plugs Per Kit
• Interchangeable Blanking Plugs & Diffusers
• Hose Tails Included
• Reusable Manifold Fabrication Tooling
• Ideal for TIG Welding Stainless Steel Manifolds
• 12-Month Warranty

Designed Specifically for Manifold Fabrication

Most tubular exhaust manifolds don't conveniently start and finish with straight sections of tube.

Primaries frequently begin or terminate with an elbow, and depending on the manifold design you may be working with either short or long radius bends.

We designed our purge plugs around this reality.

Rather than producing a cap that only works properly with a straight section of tube, the plug geometry has been designed to work with the common tube and elbow arrangements encountered during manifold fabrication.

This makes them particularly useful for:

• Turbo Manifolds
• Naturally Aspirated Exhaust Manifolds
• Individual Primary Runners
• Exhaust Collectors
• Wastegate Pipework
• Screamer Pipes
• Downpipes
• General SCH10 Fabrication

Why Backpurge?

When TIG welding stainless steel exhaust components, shielding the outside of the weld isn't enough.

Without an inert gas supply inside the tube, the hot internal surface of the weld can react with oxygen and heavily oxidise.

Backpurging replaces the air inside the workpiece with an inert shielding gas, helping produce a cleaner internal weld profile with significantly reduced oxidation.

This is particularly important when producing exhaust and turbo manifolds where weld quality, cleanliness and durability are important.

Four-Plug System

Each kit contains four individual purge plugs.

This isn't simply because four sounds better than one.

When fabricating a multi-runner manifold, having multiple plugs allows several sections to be set up and prepared without constantly removing hot purge equipment.

For example, once your first runner has been welded, you can move directly onto the next prepared runner.

By the time you've completed the next section, the previous runner should have had considerably more time to cool, allowing the purge plugs to be removed and transferred onto the next component.

This creates a simple rotation:

Prepare → Purge → Weld → Allow to Cool → Move Plugs → Repeat

It makes the process considerably more convenient when working through a complete manifold.

Tool-Free Thumb Screw Retention

Each purge plug features an integrated thumb screw locking system.

This allows the plug to be secured to the workpiece by hand without needing spanners, Allen keys or other tools every time the plug is installed or removed.

Simply position the plug correctly and tighten the thumb screw sufficiently to hold it securely in place.

This is particularly useful when you're repeatedly moving the plugs between runners during fabrication.

Diffusers Included

The kit includes four diffusers to help distribute the incoming purge gas within the workpiece.

Rather than simply directing a concentrated stream of gas into one area, the diffuser helps create a more controlled gas flow within the tube.

Correct purge flow and adequate purge time remain important. Excessive gas flow can create unnecessary turbulence and consume considerably more shielding gas without improving the result.

Blanking Plugs Included

Two blanking plugs are supplied, allowing the purge system to be configured depending on the component you're welding.

The modular arrangement allows the plugs to be set up as required for different stages of manifold fabrication.

Hose Tails Included

Two hose tails are included for connecting the purge gas supply to the appropriate plug.

Always ensure the hose is securely connected and suitable for the shielding gas and flow rates being used.

What's Included?

Each 1.25" SCH10 Purge Plug Kit contains:

• 4x Purge Plugs with Thumb Screws
• 2x Blanking Plugs
• 4x Diffusers
• 2x Hose Tails

Everything above is supplied as one complete kit.

Designed for 1.25" SCH10

This version is specifically designed for 1.25" SCH10 tube and compatible elbows.

SCH10 refers to a pipe specification and should not be confused with conventional nominal exhaust tube dimensions.

Please confirm the material you're working with before ordering.

Important - Heat

Although these plugs are intended for use during welding operations, they should not be subjected to unnecessary direct welding heat.

Allow adequate distance between the purge plug and the weld wherever possible.

After welding, components can remain extremely hot even when they no longer appear visibly hot.

Allow the workpiece and surrounding area to cool sufficiently before handling or removing the purge plugs.

Repeated excessive heat exposure may shorten the service life of the plugs.

Workshop Safety

These purge plugs are fabrication aids only and do not replace correct TIG welding practices or appropriate PPE.

Always ensure:

• The Correct Size Plug is Used
• The Plug is Securely Installed
• The Gas Hose is Secure
• Suitable Shielding Gas is Used
• Appropriate Purge Flow is Set
• The Workpiece Has Adequate Venting
• Pressure Cannot Build Inside the Workpiece
• Components are Allowed to Cool Before Handling
• Appropriate Welding PPE is Used

⚠️ DO NOT COMPLETELY SEAL A PRESSURISED GAS SUPPLY

When purging a fabricated component, the shielding gas must always have a suitable route to escape.

Never introduce a continuous gas supply into a completely sealed workpiece.

The system is intended to provide controlled gas flow through the component, not to pressurise it.

The operator is responsible for ensuring adequate venting during the purging and welding process.

12-Month Warranty*

This product is warranted to the original purchaser against manufacturing defects for a period of 12 months from purchase.

Our obligation under this warranty is limited to repair or replacement, at our discretion, where inspection confirms a manufacturing or material defect.

The warranty does not cover normal workshop wear, heat damage caused by excessive proximity to the weld, welding spatter, melting, damaged threads caused by excessive tightening, modification, incorrect gas connections, misuse or accidental damage.

These purge plugs are fabrication aids. The operator remains responsible for selecting the correct shielding gas, purge flow, venting arrangement and welding procedure for the material and component being fabricated.