TORVPRO LEARN
Guides & Charts
Practical sizing guides, gas comparisons and maintenance walkthroughs - written from the fitment data we publish on every product page. Every guide links to the parts it covers.
Which blowtorch for soldering copper pipe?
For 15 and 22 mm capillary joints a butane EN417 cartridge torch with a soldering nozzle is enough - flame shape beats power. When 28 mm work needs oxy-fuel.
Brazing nozzle sizes explained
What brazing nozzle numbers mean, how to match a size to your job, and how brazing nozzles differ from welding nozzles. Charts included.
Oxy-acetylene welding nozzle numbers: No. 1-25 explained
The British acetylene welding nozzle numbering runs No. 1-25. Learn what the number means, which size welds which thickness, and how to verify before you fit.
Rothenberger Superfire 2: finding the right replacement burner
Burner worn, flame ragged, torch not lighting? Identify the right Superfire 2 spare or repair part, fit it safely, and see what fits Quickfire and Roxy.
How to clean a clogged torch nozzle
Ragged yellow flame? Sooting nozzle? Clean it the right way: pick the correct wire size, clear the orifice without enlarging it, and know when to replace.
Which cartridges are EN417, and what fits them?
EN417 covers the cartridge and its valve, not your torch. How to spot a true EN417 can, why the label is abused, and how to confirm the fit.
Butane vs propane torches: what changes at the bench
How butane and propane differ on real work: cold weather, flame heat, wind, running cost, and when a cartridge head is no longer enough.
Soldering vs brazing: which one does your joint need?
Where soldering ends and brazing begins: the temperature convention, joint strength, filler form, flux needs, and the torch each one asks for.
Torch nozzle seats: why the same size number does not always fit
Why a No.5 from one torch will not seat in another: seat families explained by concept, what a wrong seat costs, and how to confirm a fit.
Why your torch flame turned yellow (and what to check first)
A yellow flame means the gas is not burning cleanly - usually the cartridge, the air mix or a dirty nozzle. Check them in this order and fix it in minutes.
How to choose a brazing rod for the metal in front of you
Choosing a brazing rod starts with the parent metal, not the torch. How to match rods to aluminium, copper and mixed-metal joints on an air torch.
Blowtorch safety checks before you light it
Practical blowtorch safety checks: seal testing without a flame, ventilation, clearances, eye and hand protection, cool-down, cartridge storage and disposal.
How to solder copper pipe with a blowtorch, step by step
Clean, flux, heat the fitting, feed the solder: the full capillary joint sequence for 15 and 22 mm copper pipe, plus the five mistakes that ruin joints.
How to braze aluminium with a torch: rods, flux and flame control
Low-temperature aluminium brazing with a cartridge or propane torch: rod choice, oxide control, flux, and the joints this process can and cannot handle.
Sievert blowtorch spares: matching the right replacement burner
Burner worn on a Sievert Promatic, Turbo or Pro hand torch? Identify the right replacement burner by series and stamp - fit confirmed before you order.
HOW THESE GUIDES ARE PUT TOGETHER
Specs come with a source
Published figures trace to a supplier listing or a confirmed SKU table. Anything not confirmed yet is printed as “confirmed in your quote” instead of a number we made up.
Brand names are fitment reference only
Rothenberger, Sievert, Bullfinch and Campingaz are named to tell you what a part is made to fit. We are an independent spares supplier and are not affiliated with any of them.
Unconfirmed fits are flagged, not smoothed over
Where a thread or seat still needs a physical check, the page says so. Send a photo and the model and we confirm before you order.
No gas in the post
We ship parts only - no cylinders, no cartridges. That is why orders carry no dangerous-goods restrictions and post worldwide.