I'm not at home at the moment with zero tools and zero accurate measuring devices......
What is likely to be the pipe fitting in a 2 metre long galvanised farm water trough? The tank is brand new and not something that has been sitting in a field for 20/40 years. It has a hole for a fitting, currently with a blanking plug? The hole is too small for a 1/2 inch BSP tap. The hole is around 1/16 to 1/8 smaller than the OD the 1/2 tap tread. .
3/8 BSP ?
In message snipped-for-privacy@mid.individual.net>, alan_m snipped-for-privacy@admac.myzen.co.uk> writes
Isn't this likely to be sized for a conventional float valve with the supply piping linked to that?
Usually such tanks are supplied with a cover to prevent valve damage by livestock.
This is the "supplied drain bung". I've been on line and various suppliers say they come with bung but no sizes given.
Edit: I found a measuring tape and best estimate is OD of bung thread =
17mm or 11/16ths so very probably 3/8 BPST @ 16.66 mm.This is an open tank - no cover. This isn't going to be used for cattle but raised up and the intention is to fit a tap for draining down.
That normally would be 1/2" BSP though would it not?
The ones I found on agri supplier sites said 10mm drain bung, but I assumed you'd be talking about the inlet for the ball-valve?
Most farmers would just tip the trough on its side with a front end loader or similar. Quicker than faffing with a drain plug (assuming an outside trough).
Piggies of course are expert at tipping troughs over anyway, so most of the time farmer brown is putting it back upright.
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