Self Tapping Water Valve - AP.27191 Self-Tapping Water Valve Flow Rate 1 Gpm, Outlet 1/4" Cct, 1/8" Dia. Hollow Piercing Needle. Self Piercing On Copper Tubing Or 0.035" Wall Hard Pc Fits 3/8" O.D. Through 1-1/3" O.D. Tubing Or Pipe Can Be Installed On Pipe With Existing Hole Stainless... MSRP: $8.00 Was: Now: $5.10 Add to Cart