Chapter 6.40
CONSTRUCTION MATERIALS

Sections:

6.40.010    General.

6.40.020    Ductile iron pipe.

6.40.030    Galvanized iron pipe and fittings.

6.40.040    Polyethylene plastic service pipe.

6.40.050    Polyethylene pipe encasement.

6.40.060    Ductile iron fittings.

6.40.070    Fire hydrants.

6.40.080    Gate valves, resilient seat.

6.40.090    Butterfly valves.

6.40.100    Valve boxes.

6.40.110    Valve and blow-off markers.

6.40.120    Fire hydrant guard posts.

6.40.130    Meter boxes.

6.40.140    Service saddles.

6.40.150    Service materials.

6.40.160    Residential domestic and fire sprinkler services.

6.40.170    Blow-offs.

6.40.010 General.

The type and class of materials to be used shall be as shown on the project plans approved by the district. Where no specific reference is shown, the following specifications shall govern the materials used. All materials shall be new and undamaged of a known brand, with replacement parts readily available from the general Seattle area.

Prior to the installation of any of the facilities required on the project, all materials shall be approved by the district.

No materials shall be delivered to the job site and no construction shall take place until all fees are paid, all bonds and permits obtained and a pre-construction conference has been held. In addition, no construction shall take place until the district has approved all materials.

All reference specifications herein shall be of the latest revision. [Res. 2015-6-1.]

6.40.020 Ductile iron pipe.

Ductile iron pipe shall be new, Class 52, cement-lined, conforming to ANSI Standard A21.51 (AWWA C-151).

Ductile iron pipe shall be push-on joint or mechanical joint. Pipe with push-on joints shall be furnished with a single rubber ring gasket. All gaskets, including M.J., shall be lubricated to affect the seal. Pipe with mechanical joints shall be furnished with a mechanical joint of the stuffing box type, including rubber gasket, cast-iron gland, and tee-head bolts and nuts to affect the seal. All joints shall conform to ANSI Standard A21.11 (AWWA C-111).

Flanged joint shall conform to ANSI Standard B16.1.

Internally locked joint shall be in accordance with ANSI A21.11 and equal to U.S. Pipe TR Flex, U.S. Pipe Field Lok, or Griffin “Snap Lok.”

Bell and socket joints shall be in accordance with ANSI A21.10 and equal to U.S. Pipe “Usiflex.”

Standard thickness cement mortar lining shall be in accordance with ANSI Standard A21.4 (AWWA C-104).

The contractor shall furnish certification from the manufacturer of the pipe and gasket being supplied that the inspection and all of the specified tests have been made and the results thereof comply with the requirements of this standard. [Res. 2015-6-1.]

6.40.030 Galvanized iron pipe and fittings.

Where galvanized iron pipe is specified, for blow-offs only, the pipe shall be standard weight, Schedule 40, steel pipe per Standard Specifications for black and hot dipped, zinc-coated (galvanized) welded and seamless steel pipe for ordinary uses (ASTM A-120). Fittings shall be screwed malleable iron galvanized per USA Standard B16.3. [Res. 2015-6-1.]

6.40.040 Polyethylene plastic service pipe.

All material shall be as specified on the standard detail. [Res. 2015-6-1.]

6.40.050 Polyethylene pipe encasement.

Ductile iron pipe shall be encased with polyethylene encasement. Material and installation shall be in accordance with AWWA C105. Installation shall be in accordance with Method A or Method C. [Res. 2015-6-1.]

6.40.060 Ductile iron fittings.

Ductile iron fittings shall be short body for pressure rating of 350 psi, unless otherwise noted. Metal thickness and manufacturing process shall conform to applicable portions of ANSI Standards A21.10, A21.11, A21.53, B16.2 and B16.4.

Standard cement mortar lining in accordance with ANSI Standard A21.4 (AWWA C-104).

Rubber gaskets for push-on-joint (Tyton) or mechanical joint (M.J.) in accordance with USA Standard A.21.11 (AWWA C-111).

Where restrained joints are required, fittings may be manufactured with U.S. Pipe TR Flex, Griffin “Snap Lok” or Pacific States Restrained Joint. In addition, Mega-Lugs may be used.

Rubber gaskets for use with asbestos cement pipe to be “Fluid-Tite” gaskets as manufactured by Certainteed or equal and shall be lubricated to affect the seal. (ASTM 1869) [Res. 2015-6-1.]

6.40.070 Fire hydrants.

Fire hydrants shall conform to AWWA Standard Specification C502.73 and be one of three types: Mueller Centurion, American B-62-B or M&H Reliant. They shall be a rising stem compression-type which opens counterclockwise, and closes with the pressure. The minimum main valve opening diameter shall be five and one-fourth inches unless otherwise specified. The hydrant seat and hydrant seat retaining ring shall be bronze. All external bolts, nuts and studs shall be cadmium plated in accordance with ASTM A165 Type HS or rust-proofed by some other process approved by the district. Gaskets shall be of rubber composition.

Fire hydrants shall be equipped with one four-and-one-half-inch pumper connection (National Standard Thread) with four-inch Stortz Adapter and two two-and-one-half-inch NST hose ports. Pentagon nuts or caps and operating stem shall measure one and one-fourth inch point to flat and shall open by turning to the left. Nozzle shall be fitted with renewable bronze nipples locked in place.

Fire hydrants shall be installed in accordance with the standard details in CVWDC 6.45.900. Fire hydrant ports are to be oriented as directed by the fire protection district having jurisdiction over said area.

The hydrants shall be painted with one coat of Steelcote SR-53 heavy duty, brush type primer or approved equal, and two coats of Kelley-Moore DTM 5780-563 “Safety Yellow” industrial enamel. The tops of hydrants shall be painted with two coats of Kelley-Moore DTM 5780 industrial enamel as directed by the district in accordance with the following Snohomish County Fire Code coloring table:

Color

Estimated Flow From Hydrant

Safety Blue

1,500 gpm or greater

Safety Green

1,000 to 1,499 gpm

Safety Orange

500 to 999 gpm

Safety Red

Less than 500 gpm

Black

For drafting use only (hard suction/steamer port)

White

Cross on top of hydrant – for filling tankers only

See hydrant standard detail drawing for additional specifications. [Res. 2015-6-1.]

6.40.080 Gate valves, resilient seat.

Gate valves shall conform to the requirements of AWWA Standard Specifications for gate valves for ordinary water works service No. C-500 and C-509, except as superseded by the following: They shall be iron body with epoxy coating inside, resilient seat rubber vulcanized to gate, or S.S. seat ring attached to disc with S.S. screws. The valves shall be non-rising stem, open to the left, and shall be equipped with standard two-inch square operating nuts. Valves shall be equipped with “O-ring” packing. Valves to be American-80 “CRS,” Waterous Series 500, Mueller resilient wedge or American Flow Control Series 2500 resilient wedge.

Gate valves utilizing hub ends with ductile iron or asbestos-cement pipe shall be installed with rubber gaskets to match the pipe end. Where PVC pipe is used, valves shown on the plans with hub connections shall have hub connections designed specifically for use with PVC pipe or they shall have mechanical joints with adapting gaskets to accommodate PVC pipe.

All two-inch valves shall be ball valves approved by the district. Said valves shall be furnished with a slotted operator, and with an adapting two-inch square operating nut (Ford Cat. QT-67) secured with a stainless steel cotter pin. [Res. 2015-6-1.]

6.40.090 Butterfly valves.

Butterfly valves shall be Class 150 or 250, as required depending upon the local static and test pressure at the location the valves are to be installed. The valves shall be equal to Dresser “450” or Pratt “Groundhog” and shall meet or exceed all strength requirements of AWWA C-504-70, except that certain deviations in the construction details of the valve seats and shaft seals will be considered by the district. The valves shall withstand test pressures in the closed position at two times the local static pressure or 200 psi minimum, whichever is greater.

Valve shafts shall meet or exceed the strength requirements of AWWA C-504-70 and be one-piece. Packing shall be “O-ring” except the district will review other types of packing for possible approval.

Butterfly valves to be installed underground shall have sealed mechanical operators and two-inch standard square operating nuts.

Complete manufacturer’s specifications for the valves proposed for use shall be submitted to the district for approval.

No valves shall be used which have not been approved by the district. [Res. 2015-6-1.]

6.40.100 Valve boxes.

Valve boxes shall be cast iron with adjustable sections equal to Rich Valve Company, eight-inch top section and regular 24-inch base section or base section as required. [Res. 2015-6-1.]

6.40.110 Valve and blow-off markers.

Markers for valves and blow-offs shall be “Carsonite CUM – 375” or approved equal. Markers shall be three and three-fourths inches total width with a minimum length of 62 inches. Markers shall be yellow and shall include three-inch by three-inch hi-intensity white reflective sheeting, a “CWV-116 – caution water valve” decal and a prong at the base to prevent pull-out.

Valve markers shall be stenciled with the letter “V” and lettering indicating valve size and distance in feet and inches to the valve on the face of the marker. Lettering shall be stenciled with approved permanent black marker, paint or industrial decals and shall be one and one-half inches high.

Blow-off assembly markers shall be stenciled with the letters “B.O.” and lettering indicating distance in feet and inches to the blow-off on the face of the marker. Lettering shall be stenciled with approved permanent black marker, paint or industrial decals and shall be one and one-half inches high.

See the standard detail drawings for additional specifications. [Res. 2015-6-1.]

6.40.120 Fire hydrant guard posts.

Concrete fire hydrant guard posts shall be made of precast reinforced concrete, nine inches in diameter, six feet long, or eight inches by six inches by six feet long. [Res. 2015-6-1.]

6.40.130 Meter boxes.

(1) Services with Five-Eighths-Inch by Three-Quarter-Inch Meter or One-Inch Meter. The meter boxes shall be concrete such as #1419 Brooks box and Traffic Type No. B-9 with traffic lid for five-eighths-inch by three-quarter-inch meter and BID-H for one-inch meter, as manufactured by Brooks #37H (hinged).

(2) Services with One-and-One-Half-Inch or Two-Inch Meter. The meter box shall be #65H (hinged) or #65T (traffic) made by Brooks with concrete cover and aluminum lip in traffic with three-eighths-inch steel traffic cover. [Res. 2015-6-1.]

6.40.140 Service saddles.

Direct tapping of one-inch standard corporation stop threaded tap for ductile iron class 52 or greater class pipe will be allowed. Other service taps shall be as follows:

(1) Ductile Iron Pipe, Less Than Class 52, and Asbestos Cement (AC) Pipe. Service saddles for one-inch standard corporation stop threaded tap shall be single strap equal to Mueller Company, Dresser Style 91, or Romac Industries, Inc., Style 101. Service saddles for one-and-one-half-inch and two-inch standard corporation stop threaded tap shall be double strap equal to Mueller Company, Dresser Style 91, or Romac Industries, Inc., Style 202.

(2) PVC Pipe. Service saddles shall be used on all PVC pipe. For one-inch standard corporation stop threaded tap, saddle shall be single stainless steel strap equal to Ford S 90. Service saddles for one-and-one-half-inch or two-inch standard corporation stop threaded tap shall be double stainless steel strap equal to Romac Industries, Inc., Style 202S. For services from two-inch PVC pipe, provide solvent weld tee in place of saddles and corporation stop. [Res. 2015-6-1.]

6.40.150 Service materials.

All small size valves, pipe and fittings to be as specified on the standard details or its equal approved by the district. [Res. 2015-6-1.]

6.40.160 Residential domestic and fire sprinkler services.

Combination service for residential domestic and fire sprinkler systems shall be according to the standard detail. [Res. 2015-6-1.]

6.40.170 Blow-offs.

Two-inch blow-offs shall be installed for 12-inch-diameter pipe and smaller in accordance with the standard detail. Blow-offs for pipe larger than 12 inches in diameter shall be as directed by the district. [Res. 2015-6-1.]