ASSE 5150 case studies
ASSE 5150 · Put your knowledge to work in context.
ASSE 5150 is a recertification credential for people who test backflow prevention assemblies - the devices that stop contaminated water from reversing into a potable supply. Candidates are typically plumbing inspectors, water utility staff, plumbing contractors, and cross-connection control personnel who already hold an initial tester certification and must show that their knowledge and field practice are current. The ASSE 5150 case studies are 5 cases and about 2,318 words.
1High-Rise Domestic Booster With Pressure Fluctuation Complaints
A 14-story residential tower is served by a duplex constant-speed booster pump set drawing from a 2,000-gallon break tank fed by the municipal main. Static inlet pressure at the tank fill is 42 psi.
512 words, about 3 min2Grease Interceptor Sizing for a Restaurant Tenant Build-Out
A restaurant tenant is building out a 2,400 sq ft space with a 90-seat dining room and a full commercial kitchen. Fixtures draining to the grease interceptor include a three-compartment sink (each compartment 18 in x 24 in x 12 in deep), a pre-rinse sink, a hand sink, and a floor drain in front of the dish machine.
492 words, about 2 min3Vent Termination Too Close to an Operable Window
During a rough-in inspection of a two-story single-family house, the inspector finds a 2-inch vent stack serving a second-floor bathroom group terminating through the roof. The roof penetration is 3 ft from an operable bedroom window on the same roof plane, and the vent terminates 6 inches above the roof surface.
466 words, about 2 min4Backflow Assembly Selection at a Commercial Irrigation Connection
A commercial property has a dedicated 2-inch irrigation service tapped from the municipal main. The irrigation system includes pop-up spray heads, a fertigation injection system using a chemical tank and pump, and a hose bib at the riser.
410 words, about 2 min5Plan Review Discrepancy in Drainage Fixture Units and Pipe Slope
A plan reviewer receives drawings for a three-story office building with restrooms on each floor. The drawings show a 4-inch building drain at 1/8 inch per foot slope, carrying a total of 160 drainage fixture units.
438 words, about 2 min