National Homebrew Club Ireland

Brewing Discussions => Equipment & Chemicals => Topic started by: delzep on December 23, 2015, 12:39:27 PM

Title: What size tubing do I need for this JG fitting?
Post by: delzep on December 23, 2015, 12:39:27 PM
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?
Title: Re: What size tubing do I need for this JG fitting?
Post by: Leann ull on December 23, 2015, 12:58:21 PM
5/16 would be the norm for a stout tap
Title: Re: What size tubing do I need for this JG fitting?
Post by: delzep on December 23, 2015, 01:15:19 PM
Sound
Title: Re: What size tubing do I need for this JG fitting?
Post by: delzep on December 23, 2015, 01:21:26 PM
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
Title: Re: What size tubing do I need for this JG fitting?
Post by: DEMPSEY on December 23, 2015, 03:34:01 PM
I thought 3/8th (10mm) was the norm with the JG fittings. :-\
Title: Re: What size tubing do I need for this JG fitting?
Post by: delzep on December 23, 2015, 03:51:49 PM
Quote from: DEMPSEY on December 23, 2015, 03:34:01 PM
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?

(http://i.imgur.com/SAl8xBZl.jpg)
(http://i.imgur.com/GdXSsuKl.jpg)
Title: Re: What size tubing do I need for this JG fitting?
Post by: imark on December 23, 2015, 03:57:43 PM
You don't need to set the pressure. It's already done. I think the one I have takes 3/8.
Title: Re: What size tubing do I need for this JG fitting?
Post by: delzep on December 23, 2015, 03:58:39 PM
Surely the hex in the centre is for adjusting pressure?
Title: Re: What size tubing do I need for this JG fitting?
Post by: imark on December 23, 2015, 04:45:31 PM
It's adjustable but they come set for mixed gas.
Title: Re: What size tubing do I need for this JG fitting?
Post by: Leann ull on December 23, 2015, 05:04:48 PM
They come pre set do not adjust!
Title: Re: What size tubing do I need for this JG fitting?
Post by: Leann ull on December 23, 2015, 05:06:16 PM
So carb with co2 and serve with the reg, it's stout yeah?
Title: Re: What size tubing do I need for this JG fitting?
Post by: delzep on December 23, 2015, 05:07:11 PM
Yeah stout. Nice one for the advice  O0
Title: What size tubing do I need for this JG fitting?
Post by: Leann ull on December 23, 2015, 05:07:39 PM
Do you have restrictor head and restriction valve on the tap?
Title: Re: What size tubing do I need for this JG fitting?
Post by: delzep on December 23, 2015, 05:47:32 PM
Yeah, its a Beamish pub tap
Title: Re: What size tubing do I need for this JG fitting?
Post by: Will_D on December 23, 2015, 10:13:26 PM
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
Title: Re: What size tubing do I need for this JG fitting?
Post by: Leann ull on December 23, 2015, 10:54:52 PM
In this case Will they came from Cara and I know they were calibrated by the BOC guy as a favour to Cara
Title: Re: What size tubing do I need for this JG fitting?
Post by: Will_D on December 24, 2015, 11:17:31 AM
Ok I am sure he did set the pressure but for what length of line?
Title: What size tubing do I need for this JG fitting?
Post by: Leann ull on December 24, 2015, 01:29:43 PM
Just spoke to an installer who used to work for sureserve before they were taken over earlier this year.
Full sp on these regs is that;
They are capable of serving 100l a min through 20 taps.
The manometer they use for calibration measures static and dynamic pressure.
They are set to 38 psi static.
They measure dynamic with a bleed valve.
The acceptable drop is 3 psi.
They don't measure line length, long lines just means more regs
"Volume" pubs used to have have them calibrated once every 12 months, but as they are "bombproof" they rarely need adjusting and every 3-5 years was the guesstimate for a 'high volume' Homebrewer.