Questions regarding home made backpurge system

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I rigged up a backpurge system using some hose and fittings I had lying around.This is where I'll go inline with my welder gas line (I'll cut the line and put the T in there).  It has a valve to cut off the gas to the auxiliary line when I won't need it.This is another valve for a finer control on the argon flow.I have two questions:1.  Is the T going to affect the flow to the torch?2.  I used some old 1/4" air compressor hose that I had lying around, is this OK or should I use some actual gas hose (if there is such a thing, I'm ignorant on that subject)?I don't have a fancy flow meter, I just have the regulator that came with the welder.Thanks in advance for any information you can provide me.
Reply:I use a seperate bottle of gas. I never used a T like you have. Might have to turn up the gas flow. Let us know how it works.
Reply:A better bet would be to split the line and put in a 2nd regulator. Best way to do it with 1 bottle is to feed both lines off the Tee before either regulator. That would mean a Tee with 2 seats in it for the regulators, and an adapter to fit the tank. That way, there would be no pressure drop.And then, after so much work...... you have it in your hand, and you look over to your side...... and the runner has run off. Leaving you holding the prize, wondering when the runner will return.
Reply:I have also seen regulators that have one single regulator and then 2 ball type flowmeters for doing this.  You really don't want to tee into a line after a flowmeter because it will render your settings completely useless.
Reply:Originally Posted by TubularFabI have also seen regulators that have one single regulator and then 2 ball type flowmeters for doing this.  You really don't want to tee into a line after a flowmeter because it will render your settings completely useless.
Reply:Originally Posted by RojodiabloA better bet would be to split the line and put in a 2nd regulator. Best way to do it with 1 bottle is to feed both lines off the Tee before either regulator. That would mean a Tee with 2 seats in it for the regulators, and an adapter to fit the tank. That way, there would be no pressure drop.
Reply:I had to wait until I got back to school today (only there tuesday and thursday) to get the model number off the dual flow meter regulator I found in a cabinet there.  It's a Harris 356. Attached Images
Reply:Oh - here is a link to the first thing google showed: http://www.drillspot.com/products/11...n_Helium_Meter
Reply:what are you gonna be purging? cause when we do pipe we cap off the ends and seal everything with masking tape purge it and then weld little by little
Reply:You can get a T fitting from AirGas for about $17.  It will allow you to put 2 sets of regulator/flow meters on one tank.  That's what I did.  When not using the purge side, I just turn that regulator to zero.
Reply:Originally Posted by TubularFabI had to wait until I got back to school today (only there tuesday and thursday) to get the model number off the dual flow meter regulator I found in a cabinet there.  It's a Harris 356.
Reply:ok since your welding small tubing, stainless right?,  cut a circle out of aluminum about the same size as material. drill a small hole in both sides, the seal of with tape. also tape off all openings in welding areas, and when you get close to the end un plug the hole with out the gas hose so your weld doesnt blow out at the end.  but with all that said you will still need the T fiting or dual regulator.