Two tapered threads on inlet for mating with pipe and a straight thread for a locknut. Machined flange for support against tank wall. All bronze bodies. Serrated arms for quick and easy adjustment of water level (all sizes). High tensile manganese bronze long and short arms. Stainless steel pivot bolt assembly. No-jam, single lever action. Replaceable seals. Free discharge flow capacity. No R400-1/2 12 gpm at 35 psi, 22 gpm at 85 psi. No R400-3/4 21 gpm at 35 psi, 39.9 gpm at 85 psi.