ASSE 6010 flashcards
ASSE 6010 · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Backflow
- Reverse flow of water or other substances into the potable water distribution system, caused by either backsiphonage or backpressure.
- Cross-connection
- Any actual or potential connection between a potable water system and a source of contamination or pollution.
- Backsiphonage
- Backflow caused by negative or subatmospheric pressure in the supply piping, which draws nonpotable liquid into the potable system.
- Backpressure
- Backflow caused when downstream pressure exceeds the supply pressure, pushing nonpotable water into the potable system.
- Air gap
- A physical vertical separation between a potable water outlet and the flood-level rim of a receiving vessel; it provides the highest degree of protection.
- Health hazard
- A cross-connection involving contamination that could cause illness or death, such as sewage, toxic chemicals, or pathogenic organisms.
- Non-health hazard
- A cross-connection involving a pollutant that may be unpleasant or objectionable but does not create an immediate health risk.
- Containment protection
- Protection installed at the water service entrance to prevent backflow from a customer's premises into the public water main.
- Isolation protection
- Protection installed at individual fixtures or branches to protect the potable water system within a building.
- Annual testing
- A common program requirement that each testable backflow prevention assembly be field-tested at least once every twelve months.
- Approved assembly
- A backflow prevention device listed by a recognized testing laboratory or approved by the local authority having jurisdiction.
- Cross-connection survey
- A site inspection that identifies actual or potential cross-connections, evaluates hazard, and determines required protection.
- Test report
- A record of assembly test results submitted to the water purveyor, property owner, and authority having jurisdiction as required.
- Reduced pressure principle
- An assembly with two check valves and a differential relief valve; it is used for health hazards and provides high protection.
- Double check valve assembly
- An assembly with two independent check valves and test cocks; it is used for non-health hazards and does not discharge water.
- Pressure vacuum breaker
- An assembly with a check valve and an air inlet; it must be installed above downstream piping and is used for non-health hazards.
- Atmospheric vacuum breaker
- A non-testable device with an air inlet that opens at atmospheric pressure; it cannot be under continuous pressure or have a downstream shutoff.
- Relief valve
- The hydraulically operated valve in an RPZ that discharges water when the pressure differential across the first check is lost.
- Test cock
- A small valve on an assembly used to connect test equipment and obtain pressure readings at specific points.
- Check valve
- A valve that allows flow in one direction only and closes to prevent reverse flow.
- Differential pressure gauge
- A test instrument that measures the difference between two pressures, commonly upstream and downstream pressures across a check valve.
- Test cock flushing
- Opening test cocks before connecting hoses to remove debris and prevent contamination or damage to the gauge.
- RPZ relief test
- A field test that determines the pressure at which the relief valve opens and discharges, verifying proper operation.
- Check valve tightness
- A field test that confirms a check valve holds against reverse pressure without leaking past the seat.
- Gauge calibration
- Periodic verification of test equipment accuracy, typically required at least annually by the authority or manufacturer.
- Test cock numbering
- Test cocks are numbered from upstream to downstream, beginning with number one at the supply side.
- Relief valve discharge
- Continuous discharge from an RPZ relief valve often indicates a leaking check valve, debris on the seat, or thermal expansion.
- Fouled check valve
- A check valve that fails to seat because of debris, scale, or worn rubber, causing backflow or relief valve discharge.
- Strainer maintenance
- Cleaning or replacing the upstream strainer removes debris that can clog check valves and cause test failures.
- Manufacturer parts
- Repair of backflow assemblies should use original manufacturer components to maintain approval and reliable operation.
- Retest after repair
- After any repair or replacement of components, the assembly must be field-tested again before being placed in service.
- Freeze damage
- Water freezing inside an assembly can crack bodies and distort seats, so assemblies must be drained or protected in freezing weather.