QUESTIONS AND 100% CORRECT WELL DETAILED
ANSWERS|LATEST
UPDATE!!!!2025/2026|GUARANTEED
What is the correct height to install an air gap ? - ANSWER Two times the nominal
diameter of the supply pipe or a minimum of 1 inch .
What are the components of a RP ? - ANSWER Two independently operating check
valves , a relief valve assembly , four test cocks and two shut - off valves .
What are the components of a DCVA ? - ANSWER Two independently operating check
valves , four test cocks and two shut - off valves .
What is the definition of backsiphonage ? - ANSWER Backflow caused by a drop in
supply pressure below atmospheric pressure .
The RV drips after closing customer's shut - off valve . Why ? - ANSWER CV # 1 leaks
What causes the RV to spit ? - ANSWER Line pressure fluctuation .
If there is backpressure on the RP what does the RV do ? - ANSWER Nothing unless CV
# 2 leaks .
If there is a drop in supply pressure what does the RV do ? - ANSWER Opens to dump
the zone .
1
, What holds the Relief valve open ? - ANSWER Relief valve spring .
What holds the Relief valve closed ? - ANSWER Supply pressure .
Relief valve does what if outlet shut - off valve leaks ? - ANSWER Relief valve tries but
may not open when being tested .
In test # 3 on the RP , open vent control and the gauge needle rises , what's wrong ? -
ANSWER The outlet shut - off valve leaks with backpressure .
How do you know if the outlet shut - off valve leaks ? - ANSWER 1. The RV may not
open while testing
2. The meter is running .
3. You can hear the water running .
Can you test the RP with water flowing to the customer ? - ANSWER No , the assembly
must be static .
What type of gauge do you use to test the RP ? - ANSWER Differential Pressure Gauge
.
How do you break or stop backsiphonage ? - ANSWER Add air .
What is the most important step before installing an assembly ? - ANSWER Flushing
supply line of dirt and debris .
Why install assemblies in parallel ? - ANSWER To maintain service while testing or
repairing .
2
ANSWERS|LATEST
UPDATE!!!!2025/2026|GUARANTEED
What is the correct height to install an air gap ? - ANSWER Two times the nominal
diameter of the supply pipe or a minimum of 1 inch .
What are the components of a RP ? - ANSWER Two independently operating check
valves , a relief valve assembly , four test cocks and two shut - off valves .
What are the components of a DCVA ? - ANSWER Two independently operating check
valves , four test cocks and two shut - off valves .
What is the definition of backsiphonage ? - ANSWER Backflow caused by a drop in
supply pressure below atmospheric pressure .
The RV drips after closing customer's shut - off valve . Why ? - ANSWER CV # 1 leaks
What causes the RV to spit ? - ANSWER Line pressure fluctuation .
If there is backpressure on the RP what does the RV do ? - ANSWER Nothing unless CV
# 2 leaks .
If there is a drop in supply pressure what does the RV do ? - ANSWER Opens to dump
the zone .
1
, What holds the Relief valve open ? - ANSWER Relief valve spring .
What holds the Relief valve closed ? - ANSWER Supply pressure .
Relief valve does what if outlet shut - off valve leaks ? - ANSWER Relief valve tries but
may not open when being tested .
In test # 3 on the RP , open vent control and the gauge needle rises , what's wrong ? -
ANSWER The outlet shut - off valve leaks with backpressure .
How do you know if the outlet shut - off valve leaks ? - ANSWER 1. The RV may not
open while testing
2. The meter is running .
3. You can hear the water running .
Can you test the RP with water flowing to the customer ? - ANSWER No , the assembly
must be static .
What type of gauge do you use to test the RP ? - ANSWER Differential Pressure Gauge
.
How do you break or stop backsiphonage ? - ANSWER Add air .
What is the most important step before installing an assembly ? - ANSWER Flushing
supply line of dirt and debris .
Why install assemblies in parallel ? - ANSWER To maintain service while testing or
repairing .
2
