AZ Plumber flashcards
AZ 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.
- Permit requirement
- A permit is required before installing, altering, or replacing plumbing work; minor repairs and stoppage clearing are typically exempt, and inspections follow at rough-in and final stages.
- Master plumber role
- A master or qualifying license holder may pull permits and contract plumbing work; apprentices and journeymen work under supervision and may not contract independently.
- Stop-work order
- An official order halting work that lacks a permit or is unsafe; work may resume only after the violation is corrected and the authority approves.
- Copper tube types
- Type K is thickest, followed by L and M; type M is thinnest and is limited in some jurisdictions to above-ground or nonconcealed use.
- Lead-free requirement
- Potable water piping, solder, and flux must be lead-free; wetted surfaces are limited to 0.25 percent lead by weight.
- No-hub coupling
- A cast iron soil pipe coupling with a neoprene sleeve and metal shield, tightened to the manufacturer's torque to join pipe without hubs.
- Drainage slope rule
- Horizontal drainage pipe slopes at 1/4 inch per foot for 2-inch and smaller, and 1/8 inch per foot for 3-inch and larger where permitted.
- Dielectric union
- An insulating fitting placed between copper and steel piping to interrupt galvanic current and prevent corrosion at the dissimilar metal joint.
- Water closet flush limit
- Water closets are limited to 1.6 gallons per flush; urinals are limited to 1.0 gallon per flush under current efficiency standards.
- Trap seal depth
- A fixture trap seal must be at least 2 inches and at most 4 inches deep to resist siphonage while allowing waste to pass.
- Closet flange
- A flange fastened to the floor and connected to the drain that receives the water closet and secures it in a watertight joint.
- Accessible lavatory
- A lavatory must provide knee clearance, an insulated drain, and controls within reach range to meet accessibility requirements.
- Residual pressure
- The pressure remaining at a fixture under flow; systems are sized so fixtures maintain a minimum residual, commonly 8 psi.
- Fixture unit sizing
- Fixture units are converted to demand in gallons per minute; the building supply is sized to deliver peak demand within allowable pressure loss.
- Water hammer arrestor
- A device installed near quick-closing valves to absorb the pressure surge caused by sudden stoppage of water flow.
- Building drain
- The lowest piping that receives soil and waste inside the building and conveys it to the building sewer at or outside the foundation.
- Vent stack height
- A vent stack must extend at least 6 inches above the roof surface, or higher where snow or other conditions require.
- Wet vent
- A vent that also serves as a drain for fixtures; its size and length are limited by code to prevent trap seal loss.
- Cleanout location
- Cleanouts are required at the base of stacks, at direction changes greater than 45 degrees, and at intervals along horizontal drains.
- Air gap
- The only absolute backflow protection; it requires a physical separation of at least twice the effective opening of the supply outlet.
- RPZ device
- A reduced pressure zone backflow assembly used for high-hazard protection; it requires annual testing by a certified tester.
- Grease interceptor
- A device that traps grease-laden waste from food service fixtures before it enters the drainage system; it must be accessible for cleaning.
- Cross-connection
- Any actual or potential connection between potable water and a nonpotable source that could allow contamination to enter the drinking water system.
- T&P relief valve
- A temperature and pressure relief valve required on storage water heaters; its discharge must terminate safely and must not be trapped or reduced.
- Thermal expansion tank
- A tank installed on a closed water system to absorb the volume increase caused by heating water and prevent excessive pressure.
- Garage water heater
- A water heater in a garage must be elevated so the ignition source is at least 18 inches above the floor to avoid flammable vapor ignition.
- Sediment trap
- A dirt pocket installed at each gas appliance connection, downstream of the shutoff valve, to catch debris before it reaches the controls.
- Gas piping test
- Gas piping is tested with air or inert gas; low-pressure systems commonly require 10 psi held for at least 30 minutes without pressure loss.
- Gas connector limit
- A listed gas appliance connector must not exceed 6 feet for a movable appliance and must not pass through walls or floors.
- Isometric drawing
- A drawing with three axes at 30 degrees from horizontal that shows a piping system in three dimensions for layout and takeoff.
- Riser diagram
- A schematic showing vertical stacks and their connections; it indicates relative elevations but is not drawn to horizontal scale.
- Utility locate call
- Before digging, call 811 to have underground utilities marked; hand-dig near marked lines to avoid damaging gas, water, or electric lines.