What size tubing do I need for this JG fitting?

[delzep]

I have a stout tap with a short length of tubing (about 5 inches or so with no text printed on it) which is attached to a JG fitting so i can hook up my own beer line...thing is I'm not sure which line to use. The end of the JG fitting says NSF-51 892 I H (the "1" could be a "I" and vice-versa). 3/8" tubing is a bit too big. Any ideas?

[Leann ull]

5/16 would be the norm for a stout tap

[delzep]

Sound

[delzep]

Is it the same for mixed gas tubing too? Mine looks a little bit smaller on the regulator compared to the tap connection, though its hard to tell by sight alone

[DEMPSEY]

I thought 3/8th (10mm) was the norm with the JG fittings.

[delzep]

I thought 3/8th (10mm) was the norm with the JG fittings.

I found some 5/16 and it fits perfectly on the stout tap

This is the reg I have. It only has one gauge on it, so am I just gonna have to guess what the serving pressure is?

[imark]

You don't need to set the pressure. It's already done. I think the one I have takes 3/8.

[delzep]

Surely the hex in the centre is for adjusting pressure?

[imark]

It's adjustable but they come set for mixed gas.

[Leann ull]

They come pre set do not adjust!

[Leann ull]

So carb with co2 and serve with the reg, it's stout yeah?

[delzep]

Yeah stout. Nice one for the advice 

[Leann ull]

Do you have restrictor head and restriction valve on the tap?

[delzep]

Yeah, its a Beamish pub tap

[Will_D]

1: They DO NOT come preset in any way to suit you application!

2: If you blag one* fom a BOC enginner then it has come out of a pub. The dispense line may be 10 metres away or 50 meters - so guess what? The installation engineer sets the pressure to suit the length of the line. They tend NOT to have a low pressure gauge as the engineers uses a digital manometer to set the pressure (using the hex key in the centre as mentioned) he then seals it. The pressures are different for the 25/75 and the 50/50.


* I doubt if anyon here buys these new from BOC as they are about €160 [note for tekkies]: They are two stage regulators! Imho not really need for pub gas but there you are.

MRFC: We just had an upgrade on our wash lines and the "G.Eng" was off to re-fit a number of pubs in our area with long 1/2" lines in the pythons as they were all reporting dispense problems.

The thing is that dispensening beer through long pipes is half science and half experience