Dershum Posted April 9, 2012 Share Posted April 9, 2012 After somewhat endless searching of the interweb, I'm at a loss. I picked up a Hobart Handler 125 from Northern Tool (http://www.northerntool.com/shop/tools/product_200447703_200447703) and I've also gotten a tank/cart/etc., along with a regulator (http://www.northerntool.com/shop/tools/product_200345432_200345432). However, I can't find a proper hose to connect between the regulator and the tank. I tried a 3/4 NPT fitting (carefully) to see if that's the correct size for the inlet on the welder, but it's not the correct size. I'm guessing it's 5/8, but I don't have a 5/8 fitting handy to test it with. Even with that said,I'm not sure what kind hose I would use for the connection, since the regulator side of things has a barbed fitting. I can just unscrew the barbed fitting, and find another adapter, but I'm still not sure what kind of hose I should be using for this. Hobart has a 3 1/2 foot hose with built-in regulator that I could pick up instead, but I kind of feel like an idiot not being able to figure this out. Is it safe to make your own hose for something like this, as long as the fitting are properly sized? It seems like such a simple thing yet I'm having a hell of a time figuring it out. Oh, and before anyone asks, the manual doesn't specify the inlet size on the back of the welder. Quote Link to comment Share on other sites More sharing options...
robbs70z Posted April 9, 2012 Share Posted April 9, 2012 My hobart 210 has a 5/8" inlet npt. With a rubber hose going to the reg. nothing fancy. Go to a napa they will get you going. My napa has a crazy supply of brass fittings. Quote Link to comment Share on other sites More sharing options...
BLOZ UP Posted April 9, 2012 Share Posted April 9, 2012 It's low pressure, use whatever. Quote Link to comment Share on other sites More sharing options...
Six_Shooter Posted April 9, 2012 Share Posted April 9, 2012 You can probably pick up a proper hose from a local welding supply place. Quote Link to comment Share on other sites More sharing options...
Dershum Posted April 9, 2012 Author Share Posted April 9, 2012 Thanks for the direction all I was kind of hoping it wasn't anything special, but the last thing I wanted to do was get it wrong. Quote Link to comment Share on other sites More sharing options...
MoNkEyT88 Posted April 11, 2012 Share Posted April 11, 2012 Just make sure you use pipe sealant or tape and turn your fittings in 2-3 turns from finger tight so you don't have any air leaking into your shielding gas. A big box hardware store should have fittings and tubing that would work for you. Good luck. Quote Link to comment Share on other sites More sharing options...
Six_Shooter Posted April 12, 2012 Share Posted April 12, 2012 Just make sure you use pipe sealant or tape and turn your fittings in 2-3 turns from finger tight so you don't have any air leaking into your shielding gas. For starters, many of the fittings for the regulator to the welding machine are usually of a type that have a tapered seat, these do not require any sealant, and if sealant is used on a fitting that does not require it, the sealant could cause leaks, because it may keep the tapered seat from sealing properly. NPT, and similar threads are the only ones that should use sealant on the threads themselves. Secondly, the shielding gas is at a much higher pressure than atmosphere around the tank, hose or welding machine, so you wouldn't get "air in your shielding gas," you would simply lose shielding, if there was a leak. Quote Link to comment Share on other sites More sharing options...
MoNkEyT88 Posted April 12, 2012 Share Posted April 12, 2012 Sorry, I just assumed npt because he specifically mentioned npt fittings in the first post. Yes, there are also fittings that do not require sealant. Quote Link to comment Share on other sites More sharing options...
johnc Posted April 12, 2012 Share Posted April 12, 2012 I know it doesn't apply here, bit I have to say this after seeing a regulator explode: Do not ever, ever use any sealant, tape, or any kind of hydrocarbon (oil, grease, etc.) anywhere near a fitting on an Oxygen tank. The high pressure will cause those items to combust through dieseling. IMHO, I don't use any sealant on any high pressure gas fittings. Just tighten them up and spray with soapy water to see if you have a leak. Quote Link to comment Share on other sites More sharing options...
Dershum Posted April 13, 2012 Author Share Posted April 13, 2012 After trying a few sizes I dont think it's an NPT fitting. 3/8 fits, but the threads bund almost immediately. Im going to try contacting hobart and see if I can find out what I can use outside of buying their 30cfh regulator/hose combo. Quote Link to comment Share on other sites More sharing options...
Six_Shooter Posted April 13, 2012 Share Posted April 13, 2012 Do yourself a favour and buy the correct parts from a welding shop. Quote Link to comment Share on other sites More sharing options...
Dershum Posted April 13, 2012 Author Share Posted April 13, 2012 Do yourself a favour and buy the correct parts from a welding shop. That's what I'm planning to do at this point. I've got an email with with Hobart to see what they recommend I do as well. Quote Link to comment Share on other sites More sharing options...
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