IN Plumber flashcards
IN Plumber · 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.
- Plumbing permit required
- A permit from the authority having jurisdiction must be obtained before installing, altering, or repairing a plumbing system; ordinary minor repairs are typically exempt.
- Rough-in inspection
- The rough-in inspection is requested after all piping is installed and tested but before any piping is concealed by framing, drywall, or concrete.
- Licensed contractor requirement
- Plumbing work must be performed by a licensed plumbing contractor, a licensed journeyman, or an apprentice under the direct supervision of a licensed journeyman.
- Drainage fixture unit
- One drainage fixture unit represents one cubic foot per minute, or about 7.5 gallons per minute, of flow discharged by a plumbing fixture.
- Building drain definition
- The lowest piping of a building drainage system, receiving waste from inside the building and extending 30 inches beyond the exterior wall where it becomes the building sewer.
- Water supply fixture unit
- One water supply fixture unit equals one gallon per minute of water demand and serves as the basis for sizing water distribution piping.
- Flushometer water closet demand
- A flushometer-valve water closet is rated 10 water supply fixture units, while a tank-type water closet is rated 2.5 water supply fixture units.
- Minimum fixture residual pressure
- A water distribution system must deliver at least 15 psi of residual pressure at fixtures while they are flowing at peak demand.
- Water piping test requirement
- Water distribution piping is tested with water at working pressure, but not less than 100 psi, for 15 minutes with no loss of pressure.
- Horizontal drain slope
- Drainage pipe 2 1/2 inches and smaller must slope at least 1/4 inch per foot, while pipe 3 inches and larger slopes at least 1/8 inch per foot.
- Cleanout spacing rule
- Cleanouts are required at the base of each stack, at the building drain, and at intervals not exceeding 100 feet along horizontal drainage piping.
- Drain size reduction
- Drainage piping may never be reduced in size in the direction of flow at any point from the fixture to the building sewer.
- Lavatory fixture units
- A lavatory is rated 1 drainage fixture unit, a value used in code tables to size fixture branches, stacks, and building drains.
- Vent terminal height
- A vent must extend at least 6 inches above the roof surface and terminate away from windows, doors, and outdoor air intakes.
- Vent minimum diameter
- No vent pipe may be smaller than 1 1/4 inches in diameter, and vent size may not be reduced in the direction of flow.
- Trap vent requirement
- Each trap must be protected against siphonage by a vent connected to open air, unless an approved special venting method is used.
- Trap seal depth
- A trap must hold a liquid seal at least 2 inches deep and not more than 4 inches deep to resist the passage of sewer gas.
- Grease interceptor sizing
- A grease interceptor serving food service fixtures is sized by fixture flow in gallons per minute and must remain accessible for cleaning.
- Prohibited S-trap
- S-traps and bell traps are prohibited because their shape promotes siphonage of the trap seal and makes the trap prone to clogging.
- Water closet flush volume
- Water closets installed in a plumbing system must not exceed 1.6 gallons per flush under federal water efficiency standards adopted by Indiana.
- Showerhead flow rate
- A showerhead may not discharge more than 2.5 gallons per minute when tested at 80 psi of flowing pressure.
- Lavatory faucet flow rate
- Lavatory and kitchen faucets are limited to a maximum flow of 2.2 gallons per minute at 60 psi under federal efficiency standards.
- T&P relief valve setting
- The temperature and pressure relief valve on a water heater is set to open at 210 degrees Fahrenheit or 150 psi, whichever occurs first.
- Relief discharge pipe
- The relief valve discharge pipe must be full size, contain no valves or threads, and terminate within 6 inches of the floor or outdoors.
- Thermal expansion tank
- A closed potable water system with a check valve or backflow preventer requires a thermal expansion tank to control pressure rise from heated water.
- Storm and sanitary separation
- Storm drainage from roofs, yards, and paved areas must be piped separately and may never be connected to a sanitary sewer.
- Roof drain sizing basis
- Roof drain and leader sizes are selected using the roof area drained and the design rainfall intensity in inches per hour for the site.
- Storm drain disposal point
- Storm drainage must discharge to an approved outlet such as a storm sewer, dry well, or natural watercourse, never to a sanitary line.
- Air gap definition
- An air gap is the unobstructed vertical distance through free air between a potable water outlet and the flood level rim of the receptacle it serves.
- Reduced pressure zone assembly
- A reduced pressure zone assembly protects potable water against both backpressure and backsiphonage and is required for high hazard cross connections.
- Backflow assembly testing
- Testable backflow prevention assemblies must be tested at installation and at least annually by a certified backflow prevention assembly tester.
- Hose bibb vacuum breaker
- A hose bibb requires an atmospheric or hose-connection vacuum breaker so that a submerged hose cannot siphon contaminants into the water supply.