1. (a) PWS systems must not allow the connection of a new customer without an approved sewage disposal system, as defined in OAC 252:641 (Individual and Small Public On-Site Sewage Disposal Systems) or OAC 252:656 (Water Pollution Control Construction).

2. (b) PWS systems shall:

   1. (1) not allow a physical connection between a line carrying a public drinking water supply and a line carrying water of unknown or questionable quality.
   2. (2) not allow connections from any PWS system to any device or system that poses a health threat unless it is equipped with an air gap of at least six inches (6") or two (2) pipe diameters, whichever is larger, above the overflow or drain pipe. The installation of a reduced pressure zone backflow prevention device will be considered in lieu of an air gap. To allow maintenance on the backflow prevention device, the design shall include a diversion line with equal backflow prevention. Do not locate backflow prevention devices in a pit or vault where they can become submerged. A fire suppression system is not considered a hazardous water supply.
   3. (3) not allow a cross-connection between a public water system and any private water system.
   4. (4) provide an air gap at all points where finished water is connected to a drain.

Added at 17 Ok Reg 1987, eff 6-12-00

Amended at 20 Ok Reg 1153, eff 6-1-03

Amended at 25 Ok Reg 2305, eff 7-11-08

Amended at 42 Ok Reg, Number 22, effective 9-15-25