Hi I have had two attempts at silver soldering the end caps on my boiler both unsuccessful. I am using Mapp gas with a Rothenberg torch. This works great the smaller jobs not the end caps. Even though I’m using fire bricks. It would appear I need a better heat source. obviously propane and a propane torch would be the answer. Could anyone tell me a reasonably priced one to buy?
Cheers Mike
What ‘fire bricks’? Vermiculite ones for barbeques are very good and coal fire or night storage ‘fire bricks’ are heat soaks and therefore rubbish. Likewise a piece of Rockwool roof insulation is good, but the glass fibre version will melt.
Be aware that a large torch will also need the large diameter bottle.
Bullfinch or Sievert both supply torches that take interchangeable size heads.
A lot of cheaper stuff is out there but mostly aimed at roofers so have a large but gentler flame.