Site work for a water / sewer project in Windham, Connecticut. Completed plans call for site work for a water / sewer project.

The Ductile Iron 250 PSIG Insert Valve shall be a Resilient Wedge Gate Valve designed for use in potable water control systems. The design will allow the valve to be installed into an existing pressurized pipeline while maintaining constant pressure and service as usual. Ductile Iron Construction: o The ductile iron body, bonnet and wedge provide strength and a pressure rating that meets or exceeds the requirements of AWWA C515. Insert Valve shall be ductile iron construction meeting ASTM A536 Grade 65-45-12. Heavy-duty ductile iron construction for maximum toughness and strength. o Chemical and modularity tests shall be performed as recommended by the Ductile iron Society, on a per ladle basis. Testing for tensile, yield and elongation shall be done in accordance with ASTM E8. o Sizes 12" and smaller must be capable of working on Cast/Grey Iron or Ductile Iron Class A, B, C and D, IPS PVC, C900 and C909 PVC, Steel, AC pipe diameters without changing either top or bottom portion of split valve body. o 250 PSIG maximum working pressure. The pressure rating markings must be cast into the body of the insert valve. Resilient Wedge Gate Assembly: o The construction of the Resilient Wedge shall comply with AWWA C509 requirements. o The ductile iron wedge shall be fully encapsulated with EPDM rubber by a high pressure and high temperature compression or injection mold process. This will ensure the ductile gate is fully coated with molded rubber - no exposed iron. o The resilient wedge shall seat on the valve body and not the pipe to obtain the optimum seating and flow control results. The resilient wedge shall be totally independent of the carrier pipe. o The resilient wedge shall not come into contact with the carrier pipe or depend on the carrier pipe to create a seal. Abrasion results thus shortening the life and quality of the shut down if the wedge contacts the pipe. o Pressure equalization on the down or upstream side of the closed wedge shall not be necessary to open the valve. o The wedge shall be symmetrical and seal equally well with flow in either directionFusion-Bonded Epoxy: o The insert valve is fully epoxy coated on the interior and the exterior. The fusion-bonded coating is applied prior to assembly so that even the bolt holes and body-to-bonnet flange surfaces are fully epoxy coated. o Valve shall be coated with a minimum of 8 mils epoxy in compliance with AWWA C550 and certified to ANSI/NSF-61. Gaskets and Triple O-Ring Stem Seals: o The insert valve features triple O-Ring stem seals. Two O-Rings are located above, and one O-Ring is located below the thrust collar. o The lower two O-Rings provide a permanently sealed lubrication chamber that will make the valve easier to operate over a longer period of time. The upper O-Ring ensures that sand, dirt or grit cannot enter the valve to cause damage to the lower O-Rings. o Side flange seals shall be of the O-Ring type of either round, oval, or rectangular cross-sectional shape. Valve Stem & Thrust Washers: o The gate valve stem and wedge nut shall be copper alloy in accordance with Section 4.4.5.1 of the AWWA C515 Standard. o The NRS stem must have an integral thrust collar in accordance with Section 4.4.5.3 of AWWA C515 Standard. Two-piece stem collars are not acceptable. The wedge nut shall be independent of the wedge and held in place on three sides by the wedge to prevent possible misalignment. o Two thrust washers are used. One is located above, and one is located below the stem thrust collar. Two thrust washers ensure easy operation at all times. o NRS with AWWA standard turns. o Operated by 2" square wrench nut according to ASTM A126 CL.B. All valve inserts shall be of the Open Left (black nut) type. American Made Quality: o All parts and components to be exclusively and completely assembled, manufactured, machined and coated in the USA. o All physical and chemical test results shall be recorded such that they can be accessed via the identification number on the casting. These Material Traceability Records (MTR's) are to be made available, in hard copy, to the purchaser that requests such documentation OCATION AND WORK TO BE DONE. The work to be done encompasses the furnishing of all labor, materials, equipment and supervision for the completion of valve insertions into the live Windham Water Works water distribution system at the following locations: 8-inch valve insertion on asbestos concrete pipe near 478 Valley Street, Willimantic, CT 10-inch valve insertion on asbestos concrete pipe near intersection of Airport Road and Stone Gate Drive, North Windham, CT 12-inch valve insertion on cast iron pipe near 258 Mansfield Ave, Willimantic, CT To receive consideration, such questions shall be submitted in writing to the Engineer Question Deadline 04/23/2026