I find thin walled (low pressure) pipes better anyway, expecially if adding a bulkhead/Thru-Hull fittings as when tightning it the pvc "flatterns" out and seals better, no need for loads of silicon as I find I need with the more ridged pvp.
Also on the subject of pvc pipes has anyone ever tried to mould them? I know this guy who makes model plane out of pvc pipes, he told be he just cuts it, uses a heat gun to get it roughly into shape and then irons it flat! told be it comes out perfectly flat... was thinking of tring to get the bottom flat and leave the top round.
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