... and specifications:1) B21 (stop valve): D20, D25, D32, D40, D50, D632) B33 (ball valve): 1/2" x D20, ... 1/2" x D50, 1" x D633) B29 (concealed valve): 1/2" x D20, 3/4" x D25, 1 ... 1/2" x D50, 1" x D634) B30 (concealed valve): 1/2" x D20, 3/4" x D25, 1 ... ) Pipeline network for swimming pool7) Pipeline network for solar energy facility8) Agriculture and garden production transporting systemDia20-160mm ...