Testing device and system for a backflow preventer

A testing device for a backflow preventer assembly comprising:

• a plurality of automated valves, wherein each automated valve is coupled to a corresponding test valve of the backflow preventer assembly;
• a high side diverter array coupled to at least one of the plurality of automated valves;
• a low side diverter array coupled to at least one of the plurality of automated valves;
• a vent side diverter array coupled to at least one of the plurality of automated valves;
• a pressure differential transmitter coupled to the high side diverter array and the low side diverter array;
• a high side bleed solenoid coupled to a high side of the pressure differential transmitter;
• a low side bleed solenoid coupled to a low side of the pressure differential transmitter;
• a vent side bleed solenoid coupled to a vent side diverter array;
• a plurality of bypass solenoids coupled to the high side bleed solenoid, the low side bleed solenoid and the vent side bleed solenoid;
• a first sensor coupled to the high side bleed solenoid, the low side bleed solenoid and the vent side bleed solenoid;
• a second sensor coupled to the backflow preventer assembly;
• and
• a controller controlling operation of the testing device.

A testing device for a backflow preventer assembly comprising:

• a first automated valve coupled to a first test valve of the backflow preventer assembly;
• a second automated valve coupled to a second test valve of the backflow preventer assembly;
• a third automated valve coupled to a third test valve of the backflow preventer assembly;
• a fourth automated valve coupled to a fourth test valve of the backflow preventer assembly;
• a first high side diverter coupled to the second automated valve;
• a second high side diverter coupled to the third automated valve;
• a first low side diverter coupled to the second automated valve;
• a second low side diverter coupled to the third automated valve,
• a first vent side diverter coupled to the first automated valve;
• a second vent side diverter coupled to the fourth automated valve
• a pressure differential transmitter coupled to the first and second high side diverters and the first and second low side diverters;
• a high side pressure transmitter coupled to a high side of the pressure differential transmitter;
• a high side bleed solenoid coupled to the high side of the pressure differential transmitter;
• a low side bleed solenoid coupled to a low side of the pressure differential transmitter;
• a vent side bleed solenoid coupled to a vent side diverter array;
• a first bypass solenoid coupled to the high side of the pressure differential transmitter;
• a second bypass solenoid coupled to the low side of the pressure differential transmitter;
• a third bypass solenoid coupled to the first bypass solenoid, the second bypass solenoid and the vent side bleed solenoid;
• a first sensor coupled to the high side bleed solenoid, the low side bleed solenoid and the vent side bleed solenoid;
• a second sensor coupled to the backflow preventer assembly;
• and
• a controller controlling operation of the testing device, the controller comprising:
• a processor;
• and
• a memory coupled to the processor, the memory storing program instructions that when executed by the processor, causes the processor to:
• open the high side bleed solenoid, the low side bleed solenoid and the vent side bleed solenoid;
• monitor the pressure differential transmitter, the high side pressure transmitter and the bleed valves array sensor until all reads zero “0”;
• report if the bleed valves array sensor does not read zero “0”;
• open the first high side diverter and close the second high side diverter if bleed valves array sensor reads zero “0”;
• close the first low side diverter and open the second low side diverter;
• open the first vent side diverter valve and close the second vent side diverter valve;
• close a second shut-off valve of the backflow preventer;
• open the second test valve and the third test valve;
• bled air out through the high side bleed solenoid and the low side bleed solenoid until the bleed valves array sensor senses that the air is expelled;
• close the high side bleed solenoid and the low side bleed solenoid;
• open the first bypass solenoid and the third bypass solenoid until the bleed valves array sensor senses that all the air is expelled;
• close the first bypass solenoid and open the second bypass solenoid until the bleed valves array sensor senses that the air is expelled;
• close the second bypass solenoid and the third bypass solenoid;
• open the first bypass solenoid and the third bypass solenoid;
• open the fourth test valve;
• monitor the bleed valves array sensor until the air is expelled;
• close the vent side bleed solenoid;
• monitor the pressure differential transmitter until the pressure stabilizes;
• mark as “FAILED” if the pressure does not stabilize within a predetermined time frame;
• mark as “PASSED” if the pressure stabilizes within the predetermined time frame;
• and
• close the fourth test valve.