Could that warning possibly mean not to exceed 100 psi AIR pressure when blowing out the system for winterizing ? Because when winterizing, all your faucets and toilet flush valve should be open to allow all the water to escape, in which case pressure would not be building up in the plumbing.
I just can't imagine any RV builder suggesting your rig can handle 100 psi of water pressure.
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Ed
Some Other Brand w/2020 Jeep Gladiator Toad
Living The Dream in "God's Waiting Room"
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