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karimwassef · 01/04/2013, 07:46 AM

The PVC knife valves have metal shafts (see it in the picture). Usually stainless steel for corrosive environments, but even a little steel is not welcome in a reef. If I
Found an all PVC, I'd use it in a heartbeat.

01/04/2013, 07:46 AM	#116
karimwassef Registered Member Join Date: May 2004 Location: Dallas, TX Posts: 11,033	The PVC knife valves have metal shafts (see it in the picture). Usually stainless steel for corrosive environments, but even a little steel is not welcome in a reef. If I Found an all PVC, I'd use it in a heartbeat.