My lightweight mixer (used with lightweight brazing torch, like this one) has three o-rings two for gas and one outside, to retain securing nut.
The outside one has perished. No big deal, it doesn't affect the function of the torch, but... it made me think about the two o-rings inside. Should I replace them? How often should I replace them? What type of o-rings are acceptable. Where do I get them? (it seems I can buy new mixer but no welding suppliers appear to offer o-rings as spares for blowpipe/torch mixer).
The outside one has perished. No big deal, it doesn't affect the function of the torch, but... it made me think about the two o-rings inside. Should I replace them? How often should I replace them? What type of o-rings are acceptable. Where do I get them? (it seems I can buy new mixer but no welding suppliers appear to offer o-rings as spares for blowpipe/torch mixer).