Knowing the permissible friction loss
per 100 feet (30 480 mm) of pipe and the total demand, the
diameter of the building supply pipe shall be permitted to be obtained from Chart A105.1(1), Chart A105.1(2), Chart A105.1(3), Chart A105.1(4) Chart A105.1(5), Chart A105.1(6), or Chart A105.1(7), whichever is applicable. The
diameter of pipe on or next above the coordinate point corresponding
to the estimated total demand and the permissible
friction loss will be the size needed up to the first branch from the building supply pipe.
CHART A105.1(1)
FRICTION LOSS IN HEAD (pounds-force per square inch) PER 100-FOOT LENGTH
For SI units: 1 inch = 25 nun, 1 gallon per minute = 0.06 L/s, I pound-force per square inch = 6.8947 kPa, 1 foot = 304.8 nun, 1 foot per second = 0.3048 m/s
CHART A105.1(2)
FRICTION LOSS IN HEAD (pounds-force per square inch) PER 100-FOOT LENGTH
For SI units: 1 inch = 25 mm, 1 gallon per minute = 0.06 L/s, 1 pound-force per square inch = 6.8947 kPa, 1 foot = 304.8 mm, 1 foot per second = 0.3048 m/s
CHART A105.1(3)
FRICTION LOSS IN HEAD (pounds-force per square inch) PER 100-FOOT LENGTH
For SI units: 1 inch = 25 mm, 1 gallon per minute = 0.06 L/s, 1 pound-force per square inch = 6.8947 kPa, 1 foot = 304.8 mm, 1 foot per second = 0.3048 m/s
CHART A105.1(4)
FRICTION LOSS IN HEAD (pounds-force per square inch) PER 100-FOOT LENGTH
For SI units: 1 inch = 25 mm, 1 gallon per minute = 0.06 L/s, 1 pound-force per square inch = 6.8947 kPa, 1 foot = 304.8 mm, 1 foot per second = 0.3048 m/s
CHART A105.1(5)
FRICTION LOSS IN HEAD (pounds-force per square inch) PER 100-FOOT LENGTH
For SI units: 1 inch = 25 mm, 1 gallon per minute = 0.06 L/s, 1 pound-force per square inch = 6.8947 kPa, 1 foot = 304.8 mm, 1 foot per second = 0.3048 m/s
CHART A105.1(6)
FRICTION LOSS IN HEAD (pounds-force per square inch) PER 100-FOOT LENGTH
For SI units: 1 inch = 25 mm, 1 gallon per minute = 0.06 L/s, 1 pound-force per square inch = 6.8947 kPa, 1 foot = 304.8 mm, 1 foot per second = 0.3048 m/s
CHART A105.1(7)
FRICTION LOSS IN HEAD (pounds-force per square inch) PER 100-FOOT LENGTH
For SI units: 1 inch = 25 mm, 1 gallon per minute = 0.06 L/s, 1 pound-force per square inch = 6.8947 kPa, 1 foot = 304.8 mm, 1 foot per second = 0.3048 m/s
Where copper
tubing or copper alloy pipe is to be used for the supply
piping and where the character of the water is such that slight
changes in the hydraulic characteristics are expected, Chart A105.1(1) shall be permitted to be used.
Chart A105.1(2) shall be used for ferrous
pipe with the most favorable water supply in regards to
corrosion and caking. Where the water is hard or corrosive,
Chart A105.1(3) or Chart A105.1(4) will be applicable. For
extremely hard water, it will be advisable to make additional
allowances for the reduction of the capacity of hot-water lines in service.
