For use in the Denver Water Service Area

Materials Specification – 3
for
Ductile Iron And Cast Iron Waterworks Fittings

1. General:

All cast iron and ductile iron fittings shall be manufactured in accordance with the following: AWWA C104, C110, C111, and C153 with the following additional requirements or exceptions.

2. Linings:

All sizes of cast iron sleeves shall be furnished without a cement-mortar lining. All other fittings shall be furnished with a cement-mortar lining of standard thickness and given a seal coat of asphaltic material or other material specified as defined in referenced standards. Unpainted fittings shall be subject to approval by Denver Water.

3. Type of Joint:

All fittings installed in the City and County of Denver or Total Service Areas shall be furnished with mechanical joint ends conforming to referenced standards, and in addition the tee-head bolts and hexagon nuts shall be fabricated from a high-strength, low alloy steel known in the industry as Cor-Ten or Usalloy or ductile iron Durabolt or equal.

Accessories for the mechanical joint consisting of the gasket, gland and fasteners shall be furnished and packaged separately from the fittings. Each package shall be labeled in such a manner as to provide for proper identification and the number of units per package or bundle.

4. Thickness Class:

Gray Iron fittings shall have a minimum of 250 psi pressure rating, ductile iron and ductile iron compact fittings shall be 350 psi pressure rating, and shall conform to the dimensions, weights and pressure rating shown in the tables of referenced standards.

5. Material:

All fittings shall be made from cast iron or ductile iron.

6. Certification:

The manufacturer shall furnish a sworn statement that the inspection and all of the specified tests have been made and the results thereof comply with the requirements of the applicable Standard(s) herein specified. A copy of the Certification including compliance with NSF/ANSI 61 shall be sent to Denver Water.

7. Acceptable Manufacturers:

Tyler Pipe Industries
U.S. Pipe
Griffin Pipe Products
Union Foundry Company
Star Pipe Products
Sigma