ASSE 5130 case studies
ASSE 5130 · Put your knowledge to work in context.
The ASSE 5130 credential - commonly described as the Backflow Prevention Assembly Tester certification exam - is a professional examination for individuals who test cross-connection control devices in potable water systems. It is intended for plumbing and utility tradespeople, water district and municipal field staff, irrigation and fire-protection contractors, and facilities maintenance technicians whose work requires demonstrating competence in verifying that backflow preventers are holding properly. The ASSE 5130 case studies are 5 cases and about 2,515 words.
1The Hotel Booster Pump and a Missing Thermal Expansion Control
A 14-story hotel is served by a 6-inch domestic service line with a reduced-pressure principle assembly (RPZ) installed immediately downstream of the city meter in a below-grade vault. The building has a private booster pump system set to maintain 85 psi at the top floor.
596 words, about 3 min2Irrigation System With a Dual Check and a Chemical Injection Point
A cemetery irrigation system is supplied by a 2-inch dedicated meter off a municipal main. The original installer used a dual check valve assembly (DCVA) at the meter and a pressure vacuum breaker (PVB) at the highest point of the irrigation loop, 4 feet above the lowest sprinkler head.
597 words, about 3 min3Field Test Results That Do Not Match the Gauge
A certified tester is testing a 4-inch reduced-pressure principle assembly in a vault. The differential pressure gauge reads 0 psi with both test cock valves open.
479 words, about 2 min4A Frozen RPZ Vault After a Cold Snap
A school's 3-inch RPZ is installed in a below-grade vault with a steel cover. After a week of temperatures near 10°F, custodial staff report water pooling in the vault and the relief port discharging steadily.
426 words, about 2 min5Recordkeeping Dispute After a Failed Test
A tester tests a 2-inch double check valve assembly at a laundromat and records a check valve differential of 0.8 psi on the first check and 0.5 psi on the second. The purveyor's minimum is 1.0 psi.
417 words, about 2 min