I don’t see it as excessive, then again you seen my work too, just intelligent way to do it. My thinking was you were going to insulate the under belly of the rig and run PEX between the two layers of insulation without any connectors underneath just at points of where the PEX comes up such as water stops. Though the pipe chase works well too with drain points if the PEX connections break loose and conduit for the electrical. That’s one thing I like about spray foam insulation it was fire resistant and I tried setting piece on fire it just smoldered out. Running stranded wire in there right¿
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