I picked up a new 5gpm/3,000psi cold water machine. I fully intend to send the pump/unloader bypass back to the buffer tank. However, I just read something (elsewhere) that indicates that I may need a high pressure hose for that. Nothing I’ve come across prior has indicated that. Yet the bypass hose (pictured) on the machine looks pretty heavy duty. I bought the plug, a 3/8" MPT x 3/8" barb and some 3/8" ID polybraid tubing to do the bypass (pictured). Am I good to go or is there something I’m not understanding?
Vinyl braided has held up just fine for me.
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Thank you. 
Best I can gather from looking around, the 3/8" ID x 5/8" OD has a “Working Pressure (at 70 F)” of 200psi and a “Burst Pressure (at 70 F)” of 800psi: Clear Braided PVC Hose Specifications: Wall thickness, Maximum Working Pressure, Burst Pressure, Weight per foot.
IF I understand it correctly, the unloader bypass psi may be ~300psi. If that’s correct, then I would think it should be ok, and maybe in the future I can upgrade it to 1/2" or 3/4" ID for even less restriction.
Anyone else have any thoughts about this?
You’re overthinking this. Get a braided vinyl hose, move on to other things.
You don’t need to worry about restriction, it just dumps bypass water…that’s it.
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Exact same make and model machine covering the exact issue/question:
Ok, so now I’m really confused. You asked a question, didn’t really believe us and now posting a video on how to do it.
Not sure where you got the part that I didn’t really believe “us”…??? Your previous response was really non-helpful anyway. "Get a braided vinyl hose, "? If you had bothered to pay attention, you would have realized that I already had the hose…and it’s pictured. Now you’re back with more nonsense? Give it a rest, dcbrock.
No need to get worked up, he was jus responding to your follow in which you stated a bunch of data points and asked what others thought. If you were using a closed cycle where the pressure could build up, then yes, you could potentially burst the braided line… but using it as a bypass line it will be continually flowing when in use. I’ve had braided lines blow off the end of the barb (wrong diameter/clamp not tight enough/etc) from the force of water shooting out the bypass but never had one burst because of it. So as @dcbrock said, don’t overthink it… use what you got and move on. If it does burst you’re only out a couple bucks and now know to get something more durable.
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