Water Works : Water Mains and Service Materials

2026-11-03

Unless otherwise specified , ductile iron pipe shall be class 52 and manufactured in the United States of America and shall conform to ANSI 21 . 51 ( AWWA C - 151 ) for " pipe centrifugally cast in metal molds for water ". Cement linings shall be double the standard thickness and shall conform to ANSI A21 . 4 . Seal coating shall be applied inside and out . All pipe shall be push - on type joint , in accordance with ANSI A21 . 11 . In addition , all pipe purchased may be subject to inspection and acceptance by the Manchester Water Works or its agent . The supplier and / or manufacturer shall be responsible for such accommodations and handling as are required to allow for proper inspection , if so requested by the Manchester Water Works . Additional Requirements The pipe and fittings , in addition to meeting all of the appropriate requirements of ANSI and AWWA , shall conform to the following : 1 .) All pipe and fittings shall be free of all significant casting flaws both inside and out , including slag holes , slag inclusions , laps , lamination , mold splash , and pin holes . 2 .) All linings shall be of uniform thickness with no significant waving and / or roughness . 3 .) Bell ends shall be cleaned of cement and excess seal coat material . 4 .) Spigot ends shall be properly tapered and cut ends shall be ground . Fittings Unless otherwise specified , all mechanical joint fittings shall conform to AWWA C104 / ANSI A21 . 4 , C111 / A21 . 11 or C153 / A21 . 53 . All fittings shall be pressure rated for 350 psi , ductile iron with double cement - lining thickness and seal coated inside and out , or two - part epoxy coated , and shall be manufactured in the United States of America . Fittings 4 "- 12 " shall be compact pattern per AWWA C153 . In addition , all fittings purchased may be subject to inspection and acceptance by the Manchester Water Works or its agent . The supplier and / or manufacturer shall be responsible for such accommodations and handling as are required to allow for proper inspection if so requested by the Manchester Water Works . Additional Requirements The fittings , in addition to meeting all of the appropriate requirements of ANSI and AWWA , shall conform to the following : 1 .) All fittings shall be free of all significant casting flaws both inside and out , including slag holes , slag inclusions , laps , lamination , mold splash , and pin holes . 2 .) All linings shall be of uniform thickness with no significant waving and / or roughness . 3 .) Mechanical joint bells and glands shall be dimensionally correct and free of all slag and rough edges at bolt holes . 4 .) All mechanical joints accessories necessary to complete connections will be bid separately ...

New Hampshire

2026-04-28