John Guest Speedfit

[Andy Clears]

May well have already answered my own question buty just want to see what other people thought about it.

So this idea started a while back with the idea of putting in JGS plastic pipe, Sealy sell it, and at the time the company i worked for were an agent for Sealey so i could get a good discount.

Then i noticed on some threads on this forum that some people have used copper water pipe to make up a hard line for their workshop, this got me thinking....

JGS also make plastic pipe for household plumbing with the same sort of fittings but i white instead of blue so i brought a two meter length and fitted it into the rubber air hose I'm using at the moment.

The system is running approx 90-100psi after the regulator and the JGS pipe is rated at 12bar @ 20c. I've had this on test for the last month or so with no problems what so ever but i'm still a little dubious about putting a complet hard line in the workshop, would cost me about £50.00 for this instead of about £200.00 for the blue JGS pipe from Sealey

What do you think?

Cheers
Andy

 

[hotponyshoes]

I have run 100psi+ through the white GJ tubing with no problems.
I wouldn't use it in the workshop though as it's hard to make it look tidy unless you use a clip every 50mm it will sag .
Also the end fittings to adapt it to the airline connectors are either really expensive or really weak.
Copper and solder would be the way to go, maybe a 20mm ring with 15mm drop downs?

I have got 1" steel water pipe running around mine but there are normally a few people using air at the same time although if you ever want to use a shot blaster then bigger is better

 

[eLuSiVeMiTe]

Speed fit will accep copper. No issues with sag where it's visible then

 

[hotponyshoes]

I get a pretty good discount on John guest stuff but a pack of 5 tees is about the same price as a pack of 20 copper tees!

The outlet ends to take the pipe to a thread are a bit cheaper in copper and stand up a lot better to abuse. Most of the lower price John guest ones have plastic backplates and will rip apart if you trip over an airline.

I expect copper pipe will condensate more though. The steel pipe I use is terrible. I don't know if it might be an advantage to collect some of the condensate in the ring though?

 

[gaz1]

copper is a good cunductor of heat or cold so will dissipate the heat much quicker

plastic will become brittle after a period of time just be aware of flying plastic bits if it ever gives when pressurizing it

 

[garethp]

I seem to remember something on here about regular plastic pipe shattering if its knocked while under pressure?

When I've priced up plumbing the plastic pipe is cheap but fittings are expensive, copper is the other way round.

 

[brightspark]

coppers far superior and a better heat conductor

 

[ronan]

I used copper in the shed when i got a big compressor a few years back. I have seen plastic shatter under pressure, and its nasty stuff when it does, the shards are like flying razor blades. I do not remember the copper being daft money when i done mine, and its a neat job, doesn't yellow with sunlight or age, does not sag. You could always use steel GB either.

 

[gaz1]

the pipe is too new

 

[mike os]

You shouldn't be using jg water pipe for air

 

[pedrobedro]

You shouldn't be using jg water pipe for air

A friend of mine has piped his shed with blue Alkathene as he was advised not to use the indoor domestic plastic for air because it can shatter with age and vibration cycling. Alkathene can burst but doesn't shatter. There's a bit of a discussion about it on a farming forum.

 

[Brad93]

I use JG type pipe on the pond. Goes brittle in UV light and fittings last three or four years before they start ******* air out

 

[HughF]

Pex pipe doesn't go brittle or shatter. Most of the horror stories are from the US where they use PVC pipe for domestic water. Personally, I would use pex-al-pex 16mm underfloor heating pipe.

 

[Nick DV]

You shouldn't be using jg water pipe for air

JG do sell a plastic pipe for air lines

 

[mike os]

JG do sell a plastic pipe for air lines

Yes but not water pipe

 

[hotponyshoes]

I don't think the op is talking about water pipe.
From the prices he's quoting it looks like he's buying the air stuff.

 

[Nick DV]

May well have already answered my own question buty just want to see what other people thought about it.

So this idea started a while back with the idea of putting in JGS plastic pipe, Sealy sell it, and at the time the company i worked for were an agent for Sealey so i could get a good discount.

Then i noticed on some threads on this forum that some people have used copper water pipe to make up a hard line for their workshop, this got me thinking....

JGS also make plastic pipe for household plumbing with the same sort of fittings but i white instead of blue so i brought a two meter length and fitted it into the rubber air hose I'm using at the moment.

The system is running approx 90-100psi after the regulator and the JGS pipe is rated at 12bar @ 20c. I've had this on test for the last month or so with no problems what so ever but i'm still a little dubious about putting a complet hard line in the workshop, would cost me about £50.00 for this instead of about £200.00 for the blue JGS pipe from Sealey

What do you think?

Cheers
Andy

I'm sure it's really nice to have a plumbed in air system, but is your workshop that big that you need it? Surely you'd save a lot of money of you just bought a decent length hose or retractable hose reel, and it would save a lot of messing around? Then again, I just might be a tight fisted git

 

[Nick DV]

Yes but not water pipe

No, not water pipe - plastic pipe for air

 

[mike os]

I don't think the op is talking about water pipe.
From the prices he's quoting it looks like he's buying the air stuff.

Reread op...

 

[Mikes]

The JG pipe for air is nylon. Tool Station sell it but don't seem to have much choice of fittings.