I decided to start the new year off right and chuck the old
primitive torch and do it right with a Little Torch outfit.
So here it is, and the acetelyne regulator won't fit on my
tank, so will have to send it back, call, and get one that will
fit. Darn, and I want to start playing with it right now!
Also, I'm unsure about which end of the hose the flashback
arrestors should go on. One manual says it can go on either
end, and another reference says to put it on the torch end. I
don't want to add any more weight at that end if I don't have
You didn’t indicate what type of tank you had or what Little
Torch kit you got. Little Torch comes in 2 models, one with a set
of regulators for the disposable cylinders (propane/MAPP, Oxy,
etc) & one used with the larger regulators that are usually
equipped with gauges.
The regulators for the disposable cylinders won’t work with any
other cylinders. Usually these torch kits come with the hoses
attached to the regulators.
The other kit comes with a fitting on the end of the hose that
attaches to the regulator. The other end of the hose is
permanently attached to the torch body. If this is the type of
torch you have it can be used with any regulator rated for
welding service. The regulator output is a standard size & the
inputs are also standard sizes. The regulator fitting that
attaches to the Oxy supply is a female fitting with right handed
threads. The acetylene fitting is a male fitting with left handed
threads. These regulators will not work with the disposable
Assuming you have the Little Torch kit for use with standard
regulators, from the description of the problem, I’d guess you
either have a ‘MC’ (about 16" from top of valve to bottom of
tank) or ‘B’ (about 23" from top of valve to bottom of tank).
These 2 tank use a different connector than the larger
acetylene/fuel gas cylinders. Any welding equipment/gas supplier
has adapters to adapt the connections on these tanks to the
standard regulator fitting.
The flash arrestors should be installed as close to the torch
body as practical. On a full sized welding torch, they’d be
attached at the torch body. On a Little Torch the closest they
can be attached to the torch body is at the end of the hose. The
other end of the hose is permanently attached to the torch body.
Assuming you are going to attach the hoses to the regulators &
not to any extension hoses or pipes, there’s no need to be
concerned how the arrestors are installed. They’ll only install