TCEQ IRRIGATION LICENSE REVIEWS ANSWERS AND
QUESTIONS SET A+
BPA requirements for fertilizer injection system - ✔✔Reduced Pressure Principle
Assembly (RPPA) (RPZ) is required when fertilizer injection are being used.
✔✔Causes backsiphonage? - ✔✔Caused by a negative or Sub-atmospheric pressure.
Example-City departments are using fire hydrant or there's a city main line break, or
someone sucking liquid from a glass using a straw.
✔✔Causes of leaking check valve - ✔✔Debris-can enter the valve. (Can use Y strainer
to provide a solution.)
✔✔Definition of high-hazard system? - ✔✔Non-potable water, chemicals, fertilizers
✔✔Definition of cross-connection? - ✔✔Any actual or potential connection between a
potable water supply and any source of contamination or pollution.
✔✔Degree of hazard - ✔✔A measure of the degree of risk or harm to the public's
health.
✔✔General installation requirements of BPA - ✔✔Device must check/pass Back-
siphonage, Back-pressure, constant pressure, non-health hazard, health hazard.
✔✔Installation requirements of AVB - ✔✔-Installed 6" above the highest head or outlet
in the system.
-No Valves
-Downstream.
-Installed vertically.
✔✔Installation and inspection requirements for public water system to BPA - ✔✔
✔✔installation requirements of PVB - ✔✔12" above the highest sprinkler head
Vertically installed
QUESTIONS SET A+
BPA requirements for fertilizer injection system - ✔✔Reduced Pressure Principle
Assembly (RPPA) (RPZ) is required when fertilizer injection are being used.
✔✔Causes backsiphonage? - ✔✔Caused by a negative or Sub-atmospheric pressure.
Example-City departments are using fire hydrant or there's a city main line break, or
someone sucking liquid from a glass using a straw.
✔✔Causes of leaking check valve - ✔✔Debris-can enter the valve. (Can use Y strainer
to provide a solution.)
✔✔Definition of high-hazard system? - ✔✔Non-potable water, chemicals, fertilizers
✔✔Definition of cross-connection? - ✔✔Any actual or potential connection between a
potable water supply and any source of contamination or pollution.
✔✔Degree of hazard - ✔✔A measure of the degree of risk or harm to the public's
health.
✔✔General installation requirements of BPA - ✔✔Device must check/pass Back-
siphonage, Back-pressure, constant pressure, non-health hazard, health hazard.
✔✔Installation requirements of AVB - ✔✔-Installed 6" above the highest head or outlet
in the system.
-No Valves
-Downstream.
-Installed vertically.
✔✔Installation and inspection requirements for public water system to BPA - ✔✔
✔✔installation requirements of PVB - ✔✔12" above the highest sprinkler head
Vertically installed
