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----- Original Message -----
From: "Charly Mitchel" <charly@mitchelplumbing.com>
To: "Bill Bartlett" <billbartlett@WingnutRacing.com>; <fot@autox.team.net>
Sent: Friday, November 18, 2005 7:43 AM
Subject: Re: Pneumatic shop lines
> Bill and all others interested,
> I'm a plumbing contractor in Washington State, and pvc piping is not
> allowed for use in air piping here. The reason is that when pvc breaks,
> whether brittle from cold or not, it turns to shrapnel. There have been
> several injuries from the pvc exploding, whether by temperature or impact.
> I run air lines for commercial use and we use copper or galvanized pipe.
> Galvanized piping is easy to use and I believe is rated for close to 500
> psi. Copper pipe comes in different wall thickness's and I would
recommend
> no less than a type L copper. Copper can be easier to install and modify,
> but also costs more. You'll also have less chances of a leak with copper.
> As far as running the lines, we always pitch the lines to one outlet and
> make a means for draining water out of the end. For your different drops,
> we point the tee or elbow upwards and make a 180 degree turn back down to
> the outlet. This helps to keep any moisture from getting into the tool
> outlets. You may also want to install a water separator on the outlets
> you're using the most. I usually try to remember to spray something like
> WD40 in the tool before use, WD40 is a great water displacer.
> There is one other option which I have not tried, but saw advertised in
> Griots Garage. This is PEX tubing. Pex is cross linked poly-ethylene
> tubing. It is a very good product and we use it for heating under floors.
> It is rated at over 500 psi and will not burst. The drawback about using
> this piping is it doesn't run in straight lines very easy and wants to
sag.
> You might also need special tools to assemble it with, depending on brand.
> It definitely would go together quicker.
> Charly
> TR6 #44
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