Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA
Subpart N - DISTRIBUTION
Section 604.1420 - Valves
Universal Citation: 35 IL Admin Code ยง 604.1420
Current through Register Vol. 48, No. 38, September 20, 2024
a) A sufficient number of valves must be provided to isolate portions of the distribution system during repairs and maintenance and to facilitate unidirectional flushing.
b) Location. Unless otherwise approved by the Agency under Section 604.145(b), valves must be located:
1) at not more than 500-foot
intervals in commercial districts;
2) at not more than two blocks or 1200-foot
intervals in other districts.
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