BACKFLOW TESTING

STATE TESTING

327 IAC 8-10-8 Inspection of devices; time limits

Sec. 8. (a) The customer shall install and maintain in working order at all times any cross connection control device or booster pump control device required by this rule.
(b) To ensure that each cross connection control device required by this rule is in working order, the customer shall have each device inspected or tested by a cross connection control device inspector at the time of construction or installation, and at the following intervals, in the following manner:

  • (1) Air gaps shall be inspected at intervals not exceeding one (1) year to ensure that they continue to meet the requirements of section 7 of this rule.
  • (2) Reduced pressure principle backflow preventers shall be tested at intervals not exceeding six (6) months to ensure that:
    • (A) both check valves are drip-tight under all pressure differentials; and
    • (B) the pressure differential relief valve will maintain pressure in the center chamber at least two (2) pounds per square inch below that of the inlet chamber.
  • (3) Double check valve assemblies shall be tested at intervals not exceeding one (1) year to ensure that both check valves are drip-tight under all pressure differentials.
  • (4) Pressure vacuum breakers shall be tested at intervals not exceeding one (1) year to ensure that the air inlet opens fully when water pressure is at or below atmospheric pressure.

(c) The customer shall permit access to the customer’s premises by the inspector, the customer’s public water system, or the commissioner, at reasonable times, and upon presentation of identification, for inspection of the customer water system or testing of cross connection control devices installed in accordance with this rule.

INSTALL REGULATIONS

327 IAC 8-10-7 Construction and installation requirements for air gaps or other devices

Sec. 7. (a) The discharge pipe of an air gap shall terminate:

  • (1) a minimum of two (2) pipe diameters of the discharge pipe or six (6) inches, whichever is the lesser, above the maximum recorded flood level or above the flood level rim of the receiving vessel, whichever is higher; or
  • (2) a minimum of three (3) pipe diameters of the discharge pipe or six (6) inches, whichever is the lesser, above the maximum recorded flood level or above the flood level rim of the receiving vessel, whichever is higher where:
    • (A) a side wall, rib, or similar obstruction is spaced closer than three (3) diameters from the piping affecting the air gap; or
    • (B) two (2) intersecting walls are located closer than four (4) pipe diameters from the piping affecting the air gap.

(b) Only those models of double check valve assemblies, reduced pressure principle backflow preventers, and pressure vacuum breakers that have been listed by the Foundation for Cross Connection Control and Hydraulic Research of the University of Southern California, August, 27, 1997, or those acceptable under the Indiana plumbing code pursuant to the fire prevention and building safety commission rules at 675 IAC 16-1.2 [675 IAC 16-1.2 was repealed filed Jun 30, 1999, 2:53 p.m.: 22 IR 3414. See 675 IAC 16-1.3.],
shall be installed.

(c) Reduced pressure principle backflow preventers shall be installed horizontally with:

  • (1) no plug or additional piping affixed to the pressure differential relief valve port; and
  • (2) the pressure differential relief valve port a minimum of twelve (12) inches above floor level.

Additionally, the device must be installed at a location where any leakage from the pressure differential relief valve port will be noticed, and that allows access to the valve for maintenance and testing from floor level, without use of a ladder or other similar temporary apparatus, and that will not subject the device to flooding, excessive heat, or freezing.

(d) All double check valve assemblies shall be installed at a location that allows access to the device for maintenance and testing from floor level, without use of a ladder or other similar temporary apparatus, and that will not subject the device to flooding, excessive heat, or freezing.

(e) Pressure vacuum breakers shall be installed as near as possible to the irrigation facility, at a location that allows access to the device for maintenance and testing from floor or ground level, without use of a ladder or other similar temporary apparatus, and that will not subject the device to flooding, excessive heat, or freezing. Additionally, the device must be installed between two (2) tightly closing shut-off valves, with its center line or datum point a minimum of twelve (12) inches above:

  • (1) floor level;
  • (2) the highest downstream piping or shut-off valve; and
  • (3) the highest downstream overflow rim or discharge point.