I used this with 3/8" push-to-connect fittings and a oil transfer pump, to pump cost 15w-40 oil out of my boat engine. The hose did not collapse under the suction pressure! I think the wall thickness is a little more than what you'd get with PE tubing, but this tubing is much more optically clear. It was very easy to see the oil flow, or lack thereof, and more importantly, to see when I was pulling dirty or clean "flush" oil out (just to be certain I got all the old stuff out, since it's so difficult to get out, especially cold). Great value for the money.