|(a) Before any chemical is added by any method (aspiration,
injection, etc.) to an irrigation system which is connected to any
potable water supply, the irrigation system shall be connected through
a reduced pressure principle backflow prevention assembly or air gap.
(b) Irrigation system components treated with chemical
additives and connected to any potable water supply shall be connected
through a reduced pressure principle backflow prevention assembly.
(c) Connection of more than one water source to an
irrigation system presents the potential for contamination of the
potable water supply if backflow occurs. Therefore, connection of
any additional water source to an irrigation system that is connected
to the potable water supply can only be made if the irrigation system
is connected to the potable water supply through a reduced-pressure
principle backflow prevention assembly or an air gap.
(d) If an irrigation system is designed or installed
on a property that is served by an on-site sewage facility, as defined
in Chapter 285 of this title (relating to On-Site Sewage Facilities),
(1) all irrigation piping and valves shall meet the
separation distances from the On-Site Sewage Facilities system as
required for a private water line in §285.91(10) of this title
(relating to Tables), concerning the minimum required separation distances
for on-site sewage facilities;
(2) the irrigation system is designated a health hazard
and any connections using a private or public potable water source
shall be connected to the water source through a reduced pressure
principle backflow prevention assembly as defined in §344.50
of this title (relating to Backflow Prevention Methods); and
(3) any water from the irrigation system that is applied
to the surface of the area utilized by the On-Site Sewage Facility
system shall be controlled on a separate irrigation zone or zones
so as to allow complete control of any irrigation to that area so
that there will not be excess water that would prevent the On-Site
Sewage Facilities system from operating effectively.