Quote:
Originally Posted by rocketperson44
I believe that the purpose of the wood would not be to stop the water, but to create the same effect as a solid piece of metal. If the jet dosen't have any room to spread out, it will retain its power all the way through the tubing.
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He says to cut the four sides individually, so It probably isn't going all the way through. The wood must be doing something to the water to keep it from cutting through.
Either way, I'd take his word on waterjetting.