Water Supply Lines - Sizing

Sizing water supply service and distribution lines based on Water Supply Fixture Units (WSFU). Select supply pressure range and pipe configuration to determine maximum WSFU capacity for various pipe lengths.

Calculator

Inputs

Supply Pressure Range

Meter and Street Service Line Size (inches)

Building Supply and Branch Line Size (inches)

Length of Pipe (feet)

Results

Maximum Water Supply Fixture Units (WSFU)-- WSFU

Pressure Range--

Meter Service Line (in)	Building Supply Line (in)	40 ft	60 ft	80 ft	100 ft	150 ft	200 ft
3/4	1/2	6	5	4	3	2	1
3/4	3/4	16	14	12	9	6
1	3/4	25	23	21	17	15
1	1	36	31	27	25	20	17
1 1/4	1	54	47	42	38	32	28

Meter Service Line (in)	Building Supply Line (in)	40 ft	60 ft	80 ft	100 ft	150 ft	200 ft
3/4	1/2	7	7	6	5	4	3
3/4	3/4	20	20	19	17	14	11
1	3/4	39	39	36	33	28	23
1	1	39	39	39	36	30	25
1 1/4	1	78	78	76	67	52	44

Meter Service Line (in)	Building Supply Line (in)	40 ft	60 ft	80 ft	100 ft	150 ft	200 ft
3/4	1/2	7	7	7	6	5	4
3/4	3/4	20	20	20	20	17	13
1	3/4	39	39	39	39	35	30
1	1	39	39	39	39	39	32
1 1/4	1	78	78	78	78	74	62