The following minimum standards apply to water system extensions within the city:
(1) 
Main lines.
a. 
Minimum diameter: Six inches.
b. 
Depth: Three feet, six inches of cover below final grade.
c. 
Material.
1. 
Type: Asbestos-cement pipe.
2. 
Pressure rating: 150 pounds per square inch. Field test by American Water Works Association. Manufactured within the United States.
d. 
Location: As per Figure I.[1] Mains shall be looped, with no dead ends serving more than four lots.
[1]
Editor’s note – Figure I is on file in the city offices.
(2) 
Valves.
a. 
Locations.
1. 
At tees: Two valves.
2. 
At crosses: Three valves.
3. 
At each connection to existing water system: One valve.
b. 
Type: Nonrising stem, O-ring seals, Mueller, CCW opening, M.J.
(3) 
Fire hydrants.
a. 
Locations.
1. 
At each street intersection and cul-de-sac end.
2. 
Single-family residential areas: 600 foot intervals, approximately.
3. 
Multifamily or commercial, including reserves: 300-foot intervals.
b. 
Type: Mueller Improved, 3-way, CCW opening, M.J.
(4) 
Fittings.
a. 
Material: Cast Iron, cement lined, concrete blocked, M.J.
b. 
Pressure rating: 250 pounds per square inch.
(5) 
Services.
a. 
Corporation stop: Mueller H-15,000.
b. 
Curb stop: Mueller H-15275, in approved concrete meter box.
c. 
Pipe material: Soft copper.
d. 
Size.
1. 
Single: three-fourths inch diameter.
2. 
Double: one-inch diameter.
(6) 
Backfill.
a. 
Under asphalt streets: 1.0 sack cement stabilized sand.
b. 
Other locations.
1. 
Sandy soil must be water-jetted;
2. 
Other soil may be compacted by rolling with caterpillar track or other similar method.
(Ordinance 83-150-3, § 6(D), adopted 7/26/1983)