1/8" Gas/BSP fittings

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Subject Author Date
1/8" Gas/BSP fittings Peter A Forbes 04-28-2008
Posted by Peter A Forbes on April 28, 2008, 4:45 am
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We are trying to fix a few niggles on an old Onan water-cooled generator, and
one of the last jobs is sorting out the drain tap.

When we got it, there was a bolt stuffed up inside the radiator drain tube
extension, but it should have a drain tap in there.

Have cleaned the thread out, surprisingly it was 1/8" Gas, not an NPT thread,
but we now need either a drain tap with a long body so it clears the cowling, or
an extension tube and drain tap to suit.

Has anyone got anything that would do the job or could be modified?

The drain tube need to be male/female and 1.25" long, drain tap can be either a
modern type or an older one with lever.

Beer tokens available...


Peter
--
Peter A Forbes
Prepair Ltd, Rushden, UK
peterforbes@prepair.co.uk
http://www.prepair.co.uk
http://www.prepair.eu

Posted by mark@ems-fife.co.uk on April 28, 2008, 4:47 am
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> We are trying to fix a few niggles on an old Onan water-cooled generator, and
> one of the last jobs is sorting out the drain tap.
>
> When we got it, there was a bolt stuffed up inside the radiator drain tube
> extension, but it should have a drain tap in there.
>
> Have cleaned the thread out, surprisingly it was 1/8" Gas, not an NPT thread,
> but we now need either a drain tap with a long body so it clears the cowling,
or
> an extension tube and drain tap to suit.
>
> Has anyone got anything that would do the job or could be modified?
>
> The drain tube need to be male/female and 1.25" long, drain tap can be either a
> modern type or an older one with lever.
>
> Beer tokens available...
>
> Peter
> --
> Peter A Forbes
> Prepair Ltd, Rushden, UK
> peterfor...@prepair.co.ukhttp://www.prepair.co.ukhttp://www.prepair.eu

Go to BSS and get a long barrel nipple,or an 1/8" coupling and a bit
of 1/8" nippling tube.This would let the coupling screw up against the
casting and look nicer than a hex or barrel nipple and coupling.
Mark

Posted by Peter A Forbes on April 28, 2008, 2:23 pm
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wrote:

>We are trying to fix a few niggles on an old Onan water-cooled generator, and
>one of the last jobs is sorting out the drain tap.

Thanks for the suggestions, very helpful as always.

I did pick up an assortment of extension pieces and a small lever tap, but
eventually had to take the whole radiator off the engine, including its cast
shround, to get at the drain tube which is 5" long and screwed into the base of
the rad.

Once I could get at that, I could see what the problem was. Over the years,
various bolts had been screwed into where the tap should have been, and the
thread had just rusted out, leaving a hole that was just about small enough to
let a 3/8" bolt grip.

That last piece was actually separate, and I was able to unscrew the remnants,
make up a longer brass spacer on the lathe, having blagged a bit of brass hex
from our landlord. Drilled through and tapped each end, Screwed the new tap in
and job done!

Took longer to clean the sludge out of the bottom of the radiator than sort out
the drain tap....

Peter
--
Peter & Rita Forbes
Email: diesel@easynet.co.uk
http://www.oldengine.org/members/diesel
http://www.stationary-engine.co.uk
http://www.oldengine.co.uk

Similar ThreadsPosted
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