GTT Quadzilla: the four-stage, custom-built Triple Mix torch

The GTT Quadzilla is the most ambitious torch in Glass Torch Technologies’ range — a four-stage Triple Mix burner that GTT builds to order rather than stocking. Because each one is custom, there isn’t a single fixed jet count; the configuration depends on what the maker needs. GTT lists powder-coating and compressed-air options on top of the four-stage core. This is a bespoke production tool, so the most honest way to describe it is in terms of what it is — four stages, custom-built — rather than precise numbers GTT doesn’t publish for a stock unit.

What the four-stage Triple Mix flame gives you

Triple Mix is GTT’s surface-mix technology: fuel and oxygen meet at the face of the torch, keeping the mixing chamber cool and giving a clean, penetrating flame that drives heat into the core of thick glass rather than just washing the surface. Four independently usable stages give the Quadzilla an exceptionally wide range, from a fine center flame to a very large soaking flame, configured to the build. For the underlying tech see GTT Triple Mix technology and surface mix vs premix torches; for why penetration matters on heavy boro, read soaking vs penetrating flame.

The options: powder coat and compressed air

Being a made-to-order torch, the Quadzilla can be specified with powder coating and GTT’s compressed-air path. Compressed air injects air into the fuel system so you can lower flame temperature while keeping the same flame chemistry and flame type — a useful lever on a torch this large. The full explanation is in GTT compressed air & 4-Way Mix.

Who the Quadzilla is for

The Quadzilla suits advanced makers and production studios commissioning a bespoke, four-stage torch for the largest or most specific production work — people who know exactly what they want and are ordering a torch to match. It is not an off-the-shelf purchase, and it’s far more torch than a beginner or detail-only maker needs.

Glass, fuel, and oxygen

The Quadzilla burns propane or natural gas with oxygen and runs both boro and soft glass, with its purpose firmly in large production. As a four-stage torch its oxygen demand is high and depends on the build — realistically tanked oxygen or multiple concentrators. GTT doesn’t publish the Quadzilla’s exact LPM (or a stock jet count), so size your oxygen to your work and confirm the build specifics with GTT. Start with how many LPM does my torch need.

Where it sits in the GTT lineup

The Quadzilla sits at the bespoke top of GTT’s range — the only four-stage model, above the three-stage production torches like the Viper, Cobra, and Kobuki. Like the rest of the line it’s built on GTT’s surface-mix flame behavior, so even as a custom unit it behaves like a (much larger) member of the family you already know.

Before you buy

Because it’s made to order, start with a conversation with GTT about the configuration that matches your work. Then budget for the whole system, not just the torch: an oxygen supply sized to a four-stage torch, the correct propane or natural-gas regulator (plus an air source if you take the compressed-air option), flashback arrestors on both lines, didymium eyewear, and serious ventilation. New to plumbing a torch this size? Start with the fittings, hoses & connectors guide and the glass torch safety setup guide.

Editor’s note: spec details reflect GTT’s own materials. The Quadzilla is custom built to order, so GTT doesn’t publish a stock jet count, exact oxygen flow (LPM), or current pricing — confirm those specifics with GTT before purchasing.