15-16-470 Dry pipe system capacity limits.

No more than 500 sprinklers shall be controlled by one dry pipe valve. The capacities given below for various sizes of pipe shall be used to calculate the capacity of a system.

Capacity Per Foot of Pipe
Diameter	Gallons
Diameter	Schedule 40	Schedule 10
1 in.	.045	.049
1 1/4 in.	.078	.085
1 1/2 in.	.106	.115
2 in.	.174	.190
2 1/2 in.	.248	.283
3 in.	.383	.433
3 1/2 in.	.513	.576
4 in.	.660	.740
5 in.	1.040	1.144
6 in.	1.501	1.649
8 in.	2.66	2.776

Gridded dry pipe systems shall not be permitted.

(Prior code § 91-31; Amend Coun. J. 10-30-96, p. 31216, § 1)

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