OBC Plumbing House case studies
OBC Plumbing House · Put your knowledge to work in context.
The OBC Plumbing House credential is a knowledge assessment for plumbers and plumbing contractors who work on projects governed by the Ontario Building Code (OBC). It tests whether a candidate can read code requirements and apply them to real installations: how drains, wastes, and vents are sized and arranged, how potable water is distributed and protected from contamination, how fixtures and appliances are set and connected, how storm and special waste is handled, which materials and joints are permitted, and how plumbing interfaces with fire protection and other trades. The OBC Plumbing House case studies are 5 cases and about 2,894 words.
1Vent Stack Termination Near Air Intake
A 12-story mixed-use building has a plumbing vent stack that terminates on the roof. The building also has a rooftop air-handling unit with an outdoor air intake located 8 feet horizontally from the vent stack.
506 words, about 3 min2Grease Interceptor Sizing for a Restaurant
A new restaurant is being built with a commercial kitchen that has three sinks (each 24x24x12 inches), one dishwasher (rated at 20 gallons per hour), and one floor drain. The local plumbing code requires a grease interceptor for all commercial kitchens.
666 words, about 3 min3Water Heater Temperature and Scald Protection
A new assisted living facility is being designed with a central water heating system. The plumbing code requires that hot water be delivered to fixtures at a temperature not exceeding 120°F to prevent scalding, but the facility wants to store water at 140°F to prevent Legionella growth.
508 words, about 3 min4Storm Drainage Sizing for a Parking Deck
A new parking deck has a roof area of 20,000 square feet. The local plumbing code requires storm drainage to be sized based on a 100-year, 1-hour rainfall intensity of 4 inches per hour.
590 words, about 3 min5Fire Sprinkler System and Domestic Water Supply Coordination
A new commercial building is being constructed with a combined domestic water and fire sprinkler system. The domestic water supply enters the building through a 2-inch service line at 60 psi static pressure.
624 words, about 3 min