These valve manifolds will save you time and aggravation. They are made with quarter-turn valves. The manifold ports are 1/2" FNPT and a 1/2" FNPT plug is included. Each valve is 1/4" FNPT. Each valve will pass 0.5 gpm with less than 1 psi pressure loss. They also make excellent manifolds for air distribution. The 1/2" threaded plug may be removed for another connection.