Building your own brewing system? Looking for the best weldless valve? Now you can buy our Ruby Street Weldless Ball Valves to complete your project. Our proprietary design features an O-ring groove that’s machined right into the ball valve. This means that you can crank them down to achieve the same rock solid feeling connection that a welded fitting would offer. The all stainless 3 piece valve allows you to completely disassemble for cleaning if necessary. Please note that the rubber O-ring installs on the outside of your tank.