Heavy Bodied PVC or CPVC Computer engineered, heavy bodied PVC or CPVC construction adds extra strength with superior chemical and corrosion resistance. Non-rising Stem Non-rising stem reduces clearance requirements and incorporates an O-ring stem seal which eliminates the need to retighten the stem nut, as required with traditional stem packing in order to stop leaks. Specially Designed Sealing Surface Specially designed sealing surface and tapered wedge promote positive sealing and smooth operation with minimal tightening. Exclusive Strain-Equalizing Thread Special strain-equalizing thread is used to couple the stem and wedge. This exclusive feature reduces the chance of stripping wedge threads in the event of accidental over tightening. High Impact Polypropylene Handle Wheel style, high impact polypropylene handle is sized for a solid grip to effect positive opening and closing. Fully Repairable In-Line Replaceable components are accessible without removing valve from line. Convenient O-ring replacement kits provide for easy ordering, servicing and extended valve life.