Models View all 2" Ball Valve (316 S/S) - 3 Piece 175 2855 9 0.5" Steam Trap 57 1227 10 1/2 '' Ball Valve (S/S) - 3 piece 52 1684 12 1'' Non Return Valve 29 1461 4 1'' Flow Switch 25 338 3 1'' Flow Monitor SM8000 16 138 0