METHOD STATEMENT PLUMBING DOMESTIC WATER PIPING SYSTEM Butterfly Valve Installation and Maintenance Procedure METHOD STATEMENT PLUMBING DOMESTIC WATER PIPING SYSTEMMOS-WATER-SUPPLY-SYSTEM-UAE-PROJECTDownload By Md Abu Zaed Khan Hello, this is Engr. Zaed Khan Planning Engineer, Associate member of Society of Engineers UAE. Expert in construction project planning, FIDIC red book, computation of extension of time claim, Contract agreement and contractual letters. View all of Md Abu Zaed Khan's posts.