Estimated rate of flow up to 1.5 gpm at 60 psi PVC for corrosion resistance Tank mount with extended threads on inlet side of valve for mounting through tank wall Note: MA052 has a 1/2 NPT pipe thread. This is extremely common in the plumbing world. The thread measures about 3/4 of an inch in diameter, this is a common mistake to those who are unfamiliar with pipe threads and plumbing 1/2" NPT male threaded inlet and free-flow outlet