I'm not out of stock on silicone. Honestly I wouldn't use the vinyl stuff. If you had to, 3/4" ID would make it over the threads. 1/2" NPT threads are about .84". You'll still need to heat it with hot water but the main thing is that silicone seems to fill in the valleys of the threads and I don't know if pvc will do that.
Sightglass, Refractometer, Ball Valve, Weldless bulkhead, Thermometer, Decals, Stainless Steel Fittings, Compression Fittings, Camlock Quick Disconnects, Scale, RIMS tube, Plate Chiller, Chugger Pump, Super Clear Silicone Tubing, and more!New Stuff?