BrassCraft PSBV503-12 Gas Shut Off Valve Forged brass body eliminates pinhole leaks commonly associated with cast products PTFE seats assure a tight seal and easy on & off operation even after long periods of inactivity Blow-out-proof stem assembled from the inside with double O-rings to ensure safe, reliable performance 100% Leak tested. CSA certified Temperature rating: -40 Degree F to 150 Degree. Pressure rating: 5 PSI maximum