(A) (1) Both the service line and house lines shall be sufficiently large so that the loss in pressure from the gas main to any gas burning appliance shall not be greater than one-half inch water column when all gas burning appliances are burning simultaneously and at full capacity.
(2) The following specifications for pipe sizes have been tested and approved and will apply in this connection:
Number of Openings | Minimum Size of Pipe from Meter | From Meter to First Opening, Maximum Feet of Pipe | ||
Two inches | One and one- fourth inches | One inch | ||
Number of Openings | Minimum Size of Pipe from Meter | From Meter to First Opening, Maximum Feet of Pipe | ||
Two inches | One and one- fourth inches | One inch | ||
One | One and one-fourth inch | 180 | 135 | |
Two | One and one-fourth inch to first one inch to second | 180 | 135 | 100 |
Three | One and one-fourth inch to first one inch to second and third | 180 | 135 | 95 |
Four | One and one-fourth inch to first one inch to second, third and fourth | 180 | 135 | 90 |
Five | One and one-fourth inch to first and second one inch to third, fourth and fifth | 180 | 135 | 90 |
Six | One and one-fourth inch to first, second and third one inch to fourth, fifth and sixth | 180 | 135 | 85 |
Seven | One and one-fourth inch to first, second, third and fourth one inch to fifth, sixth and seventh | 180 | 135 | 80 |
Eight | One and one-half inch to first one and one-fourth to second, fourth and fifth one inch to sixth, seventh and eighth | 180 | 120 | 75 |
Nine | One and one-half inch to first and second one and one-fourth inch to third, fourth, fifth and sixth one inch to seventh, eighth and ninth | 180 | 120 | 70 |
Ten | Two inches to first one and one-half inch to second and third one and one-fourth inch to fourth, fifth, sixth and seventh one inch to eighth, ninth and tenth | 170 | 110 | 65 |
Number of Openings | Minimum Size of Pipe from Meter | From Meter to First Opening, Maximum Feet of Pipe | ||
Two inches | One and one- fourth inches | One inch | ||
11 | Two inches to first and second one and one-half inch to third, fourth and fifth one and one-fourth inch to sixth, seventh, eighth and ninth one inch to tenth, eleventh and twelfth | 165 | 100 | 55 |
12 | Two inches to first, second and third one and one-half inch to fourth, fifth and sixth one and one-fourth inch to seventh, eighth and ninth one inch to tenth, eleventh and twelfth | 165 | 100 | 55 |
In computing length of lines for two inches add five feet for each ell or tee for one and one-half inches add three feet for each ell or tee for one and one-fourth inches add three feet for each ell or tee for one inch add two feet for each ell or tee | ||||
(3) The word “opening,” as above, specifies the point in the piping where branch line extends to any single opening from main feed line. These branch lines must not be less than one inch in size, with not more than four openings on any one-inch line.
(B) Risers through the floor shall not be less than one-half inch in size for ordinary heater openings and not less than three-fourths inch for cook stove and water heaters nor shall they be greater than 36 inches in length. In piping double residence and apartment houses, the rule governing sizes of pipes in single residences shall apply treating each apartment as a single residence. In determining the minimum sizes of service and house line, the number of openings shall not be considered less than the total number of rooms in the building, minus two.
(C) Where buildings and houses require more than 12 openings or when a furnace is to be used or where cafés, hotels, pressing establishments and the like, which require an unusual amount of gas are to be piped for use for one or more appliances, the gas company shall be consulted for special specifications.
(D) Neither shellac or cement will be approved for use on threaded joints, caulking or cement shall not be used to repair faulty work in piping and all imperfect fittings shall be replaced. No bushings, unions or cast-iron fittings in gas lines will be approved. All reductions in size of pipe shall be made at branch lines by means of reducing tees.
(E) Be certain that all pipe has nothing inside of it before using. All pipe shall be carefully reamed to remove burrs.
(F) All house lines shall be strapped securely to joists by means of standard wire hangers or pipe straps.
(G) A riser shall be installed in riser line or housepiping at the point where it enters the building so that the pipe enters the building or foundation not less than six inches above the ground level.
(1989 Code, § 150.56) (Ord. 671, passed - -1951)