(a) The type of protection required shall depend on the degree of hazard. The degree of hazard and appropriate backflow protection shall be determined by the Utilities Director.
(1) Severe health hazard classification shall mean an actual or potential threat of contamination of the water system that could be lethal. An approved fixed air gap separation shall be installed and maintained in accordance with this chapter.
(2) Health hazard classification shall mean an actual or potential threat of contamination of a physical or toxic nature that would be a danger to health. An approved fixed air gap separation or an approved reduced pressure principle backflow prevention assembly shall be installed and maintained in accordance with this chapter.
(3) Non-health hazard classification shall mean an actual or potential threat to the physical properties or the potability of the water system, but which would not constitute a health hazard, as defined. An approved fixed air gap separation, an approved reduced pressure principle backflow prevention assembly or an approved double check backflow assembly shall be installed and maintained in accordance with this chapter.
(b) Below is a list of types of properties and the backflow requirements. This list was established as a guideline and is not to be used as a legal requirement without the approval of the Utility Director. Up-to-date requirements can be obtained by contacting the backflow prevention program office with the Water Distribution Office.
TYPE OF PROPERTY | REQUIREMENTS |
INDUSTRIAL (as defined by the DOW) | RP |
COMMERCIAL |
(1) Backflow protection at the service shall match the highest level of water-use hazard on-site. However, if there is only one water-use hazard on-site and in the opinion of the Utilities Director, the make up piping to this hazard can be permanently isolated, an isolation backflow assembly approved for the hazard can be used in lieu of one at the water service. In addition to one at the water service. (Severe health hazard instances.)
RESIDENTIAL
* With lawn irrigation or direct plumbing pool | RP |
* * Air gap or Pressure Vacuum Breaker (where no potential or backpressure exists) can be used as isolation in lieu of an RP at the service - with approval from the Utilities Director. | |
* If water used exists other than domestic | RP |
* Where second source water is available to the property to the property | RP |
The below accounts are to be protected as listed
Regardless of the types of on-site water-use hazards.
* Hospitals Air Gap or RP * Mortuaries Air Gap or RP * Medical clinic, office, etc. Air Gap or RP * Nursing & convalescent homes Air Gap or RP * Laboratories Air Gap or RP * Sewage treatment plants & pumping stations Air Gap or RP * Storm water-pumping stations Air Gap or RP * Car washes Air Gap or RP * Lawn irrigation Air Gap or RP * Automotive repair and body repair shops Air Gap or RP * Commercial lease accounts Air Gap or RP * Full service restaurants Air Gap or RP |
BACKFLOW PREVENTION ASSEMBLY REQUIREMENT KEY
Air Gap | Physical gap in pipe after service valve; requires distance through atmosphere equal to two times the pipe diameter, but never less than one inch |
RP | Reduced Pressure Backflow Prevention Assembly |
DC | Double Check Backflow Prevention Assembly |
PVB | Pressure Vacuum Breaker Backflow Prevention Assembly |
(c) The type of protection required under this chapter shall be an approved fixed air gap separation or an approved reduced pressure principle backflow prevention assembly.
(d) The type of protection required for the bypass line under this chapter shall be equal to the containment assembly required.
(e) Fire protection systems with chemicals added or the ability to be added shall install an approved reduced pressure principle backflow prevention assembly.
Fire protection systems that can not be subject to chemicals shall have an approved double check backflow assembly installed.
A reduced pressure detector assembly (ASSE 1047) and double check detector assembly (ASSE 1048) can be installed in lieu of reduced pressure or double check backflow assemblies respectively. Note that all meter requirements are to comply with the City of Heath, Division of Water meter installation rules.
This rule shall not supersede the City of Heath, Division of Water Ordinance that prohibits direct or indirect connections between the Heath public potable water system and second source water systems that include but are not limited to wells, ponds or grey water.
(Ord. 71-2006. Passed 10-16-06.)