ICC P1 flashcards
ICC P1 · 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.
- DWV hydrostatic test
- A drainage and vent system water test holds a 10-foot (3,048 mm) head of water for 15 minutes without leakage; air testing uses 5 psi for 15 minutes.
- Water distribution test
- The water supply system is filled with potable water, brought to not less than working pressure, and held for 15 minutes with no drop or leakage.
- Permit requirement
- A permit is required before new plumbing installation, alteration, or replacement; ordinary repairs to existing fixtures and valves generally do not require a permit.
- Flood hazard plumbing
- In flood hazard areas, plumbing fixtures, equipment, and connections must be installed to minimize flood damage and remain accessible for inspection and repair.
- Water closet spacing
- Water closets must be at least 15 inches (381 mm) from centerline to any side wall or partition and have at least 30 inches (762 mm) of clear width.
- Lavatory flow limit
- Lavatory faucets are limited to 2.2 gallons per minute (8.3 L/min) at 60 psi, a federal and plumbing code fixture efficiency requirement.
- DFU: water closet
- A water closet has a drainage fixture unit (DFU) value of 3, used to size drainage piping and stacks.
- DFU: lavatory
- A lavatory has a DFU value of 1; a bathtub or shower has a DFU value of 2.
- T&P relief valve setting
- A temperature and pressure relief valve on a water heater opens at not more than 210°F (99°C) and 150 psi (1,034 kPa).
- T&P discharge termination
- The relief valve discharge pipe is full-size, gravity-flow, without traps or valves, and terminates not more than 6 inches (152 mm) above the floor or waste receptor.
- Water heater drain pan
- A drain pan under a water heater is at least 1.5 inches (38 mm) deep and 1.5 inches larger in diameter than the heater, with a 3/4-inch drain.
- Maximum static pressure
- Plumbing systems must be limited to 80 psi (552 kPa) static pressure; a pressure-reducing valve is required where supply pressure exceeds 80 psi.
- Minimum fixture pressure
- Plumbing fixtures require a minimum residual flowing pressure of 8 psi (55 kPa) at the fixture under peak demand conditions.
- Backflow prevention
- An air gap, reduced-pressure zone assembly, or vacuum breaker protects the potable water supply from contamination at cross-connections.
- Water hammer arrestor
- Water hammer arrestors are installed near quick-closing valves and appliances to absorb pressure surges in water piping.
- Drainage slope
- Horizontal drainage pipe 2.5 inches and smaller slopes at 1/4 inch per foot (2%); pipe 3 inches and larger slopes at 1/8 inch per foot (1%).
- Cleanout location
- Cleanouts are required at the base of each stack, at changes of direction greater than 45 degrees, and at intervals not exceeding 100 feet in horizontal drains.
- Backwater valve
- A backwater valve is required on drainage fixtures that are below the level of the next upstream manhole cover, to prevent sewage backup.
- Horizontal 90-degree turn
- A 90-degree turn in horizontal drainage piping uses two 45-degree fittings or a long-radius bend, unless the turn occurs at a stack.
- Vent pipe minimum size
- A vent pipe must be not less than 1 1/4 inches (32 mm) nominal diameter.
- Trap arm length
- At 1/4-inch-per-foot slope, the maximum trap arm length is 5 feet for 1 1/4-inch, 6 feet for 1 1/2-inch, 8 feet for 2-inch, 12 feet for 3-inch, and 16 feet for 4-inch pipe.
- Vent terminal height
- A vent terminal extends not less than 6 inches (152 mm) above the roof surface and above anticipated snow accumulation.
- Air admittance valve
- An air admittance valve admits air into a drainage system to protect trap seals and must be installed in an accessible location, with limitations on use.
- Trap seal depth
- A plumbing trap maintains a water seal of at least 2 inches (51 mm) and not more than 4 inches (102 mm).
- Prohibited traps
- S-traps, bell traps, crown vents, and drum traps are prohibited because they can lose their trap seal or obstruct flow; listed exceptions apply.
- Grease interceptor
- A grease interceptor is required for commercial food preparation sinks and drains to prevent fats, oils, and grease from entering the drainage system.
- Storm and sanitary separation
- Storm drainage must discharge to a separate storm system and may not connect to the sanitary drainage system.
- Secondary roof drainage
- Secondary roof drainage, such as overflow scuppers or drains, is required to prevent roof ponding if primary roof drains become blocked.
- Roof drain sizing
- Roof drains and leaders are sized using the roof area, the local design rainfall rate, and the code sizing table.
- Sediment trap
- A sediment trap (drip leg) is installed at the appliance inlet to capture dirt and debris before it reaches the gas controls.
- Gas piping test
- Fuel gas piping is tested at not less than 3 psi (20.7 kPa) for 10 minutes, or at 1.5 times working pressure if higher.
- Appliance shutoff valve
- A manual shutoff valve is required upstream of each gas appliance, in the same room and within 6 feet (1,829 mm) of the appliance.