610.8 Size of Meter and Building Supply Pipe UsingTable

The size of the meter and the building supply pipe shall be determined as follows: (1) Determine the available pressure at the water meter or

other source of supply.

(1) Determine the available pressure at the water meter or

other source of supply. (2) Add or subtract depending on positive or negative ele vation change, ¹ ⁄2 psi (3.4 kPa) for each foot (305 mm) of

	INDIVIDUAL	FIXTURE UNITS
NUMBER OF	FIXTURE UNITS	ASSIGNED FOR WATER
FLUSHOMETER VALVES 1 2 3 4 5 or more	ASSIGNED IN DECREASING VALUE 40 30 20 15 10 each	CLOSETS AND SIMILAR 10-UNIT FIXTURES IN ACCUMULATIVE VALUES 40 70 90 ~~105~~ ~~115 plus 10 for each~~ additional fixture in excess of 5
FIXTURE CATEG	ORY: URINALS WITH F	LUSHOMETER VALVES

(2) Add or subtract depending on positive or negative ele vation change, ¹ ⁄2 psi (3.4 kPa) for each foot (305 mm) of difference in elevation between such source of supply and the highest water supply outlet in the building or on the premises. (3) Use the “pressure range” group within which this pres sure will fall using Table 610.4.

(3) Use the “pressure range” group within which this pres sure will fall using Table 610.4. (4) Select the “length” column that is equal to or longer than

the required length.

(4) Select the “length” column that is equal to or longer than

the required length. (5) Follow down the column to a fixture unit value equal to

or exceeding the total number of fixture units required

(5) Follow down the column to a fixture unit value equal to

or exceeding the total number of fixture units required by the installation. (6) Having located the proper fixture unit value for the

required length, sizes of meter and building supply pipe

Having located the proper fixture unit value for the

required length, sizes of meter and building supply pipe as found in the two left-hand columns shall be applied.

NUMBER OF FLUSHOMETER VALVES	INDIVIDUAL FIXTURE UNITS ASSIGNED IN DECREASING	FIXTURE UNITS ASSIGNED FOR URINALS AND SIMILAR 5-UNIT FIXTURES IN
1 2 3 4 5 or more	VALUE 20 15 10 8 5 each	ACCUMULATIVE VALUES 20 35 45 53 ~~58 plus 5 for each addi-~~ tional fixture in excess of 5

156 2019 CALIFORNIA PLUMBING CODE

WATER SUPPLY AND DISTRIBUTION

In the example below, fixture units assigned to each section of pipe are computed. Each capital letter refers to the section of pipe above it unless otherwise shown.

LAV LAV UR UR WC WC

610.12.1 Copper Tube Systems. Maximum velocities in copper and copper alloy tube and fitting systems shall not exceed 8 feet per second (ft/s) (2.4 m/s) in cold water and 5 ft/s (1.5 m/s) in hot water. 610.12.2 Tubing Systems Using Copper Fittings. Maximum velocities through copper fittings in tubing other than copper shall not exceed 8 ft/s (2.4 m/s) in cold water and 5 ft/s (1.5 m/s) in hot water.