Does anybody know where I could find this fitting which is a reducer? photos included

elmocambo · Jun 10, 2025

I think it is a gas fitting, although it is used in an old LNER station lamp post.
The reducer female part measures 15/16" the male part measures 1 5/16" approximately.
It is stamped WALWORTH MADE IN THE USA
It also fits the lamp shade but is actually from the post to support a braced cantilever piece of conduit.

ShaunCorbs · Jun 10, 2025

Hard to say without seeing a tape on it but looks bsp/npt so might be in look with a 1”x3/4 reducing bush

elmocambo · Jun 11, 2025

ShaunCorbs said:
Hard to say without seeing a tape on it but looks bsp/npt so might be in look with a 1”x3/4 reducing bush

Thanks Shaun
I obtained one and it seems compatible and fine for my purposes which isn't plumbing but restoration.
It's a tapered thread so not sure how much to tighten safely

ShaunCorbs · Jun 11, 2025

Snug plus 1/4-1/2 a turn will be fine

elmocambo · Jun 12, 2025

Thanks

SamBdg · Jun 17, 2025

As it's American it will be American National Standard Pipe Threads (ANSI/ASME B1.20.1) known as NPT, not the BSP you have. They are a different thread angle 60degrees not 55degrees and have pointed rather than rounded angles.
They will as you have discovered fit to a certain extent but I wouldn't rely on the seal. In a very low pressure gas fitting you are probably ok just using Loctite55 thread sealing cord, but should really be buying the correct NPT hex head bush.

SamBdg · Jun 17, 2025

The correct size NPT threaded bush is probably available on eBay. Or use two adapters NPT-BSP/BSP-NPT

SamBdg said:
As it's American it will be American National Standard Pipe Threads (ANSI/ASME B1.20.1) known as NPT, not the BSP you have. They are a different thread angle 60degrees not 55degrees and have pointed rather than rounded angles.
They will as you have discovered fit to a certain extent but I wouldn't rely on the seal. In a very low pressure gas fitting you are probably ok just using Loctite55 thread sealing cord, but should really be buying the correct NPT hex head bush.

Of course the fact that it's an American fitting on an LNER lamp may well suggest that it's not the original part and it should in fact be BSP