Free ICC P2 Exam Flashcards

The code official (building official). Per IPC Section 103, the code official administers and enforces the code, issues permits, conducts inspections, and renders interpretations — not the master plumber, design professional, or contractor.

When required by the code official (IPC 106.3). The code official may waive documents for minor repair or replacement work while still requiring them for significant installations.

Install an approved steel shield plate (minimum 0.0575 inch, 16 gauge) covering the area where the pipe is close enough to the framing member's edge to be vulnerable to nails or screws.

Water test: fill to at least 10 feet of head above the highest fitting, hold 15 minutes, no visible leakage. Air test: pressurize to 5 psi (or 10 in Hg), hold 15 minutes with no added air. Plastic DWV piping may not be air-tested.

4 water closets — the tiered ratio applies 1 per 25 for the first 50 occupants (2 WC) plus 1 per 50 for the remaining 100 occupants (2 WC).

When the occupant load is 25 or fewer, a single combined-use toilet room is permitted under the IPC 403.1 exceptions.

When the occupant load is 15 or fewer, IPC 403.1 exempts the space from providing a service sink.

At least 21 inches of clear space in front of the fixture; centerline at least 15 inches from any side wall or obstruction; and at least 30 inches center-to-center between adjacent water closets.

Centerline set 16-18 inches from the side wall, with a 60-inch clear floor space provided for a side transfer, matching the accessible stall dimensions referenced by the IPC for accessible fixtures.

At least 27 inches high and 8 inches deep at the front of the clearance, allowing forward wheelchair approach without contacting the underside of the lavatory.

Water closets: 1.6 gallons per flush. Urinals: 1.0 gallon per flush. Private lavatory faucets: 2.2 gpm at 60 psi. Public, non-metering lavatory faucets: 0.5 gpm at 60 psi.

Temperature setting not more than 210°F. Pressure setting not more than the tank's rated working pressure or 150 psi, whichever is less.

Full size of the valve outlet with no reduction, no valve or threaded end, cannot connect directly to the drainage system, and must discharge through an air gap to a floor, pan, waste receptor, or outdoors, terminating not more than 6 inches and not less than 2x the pipe diameter above the receptor, at a point that is readily observable.

Required where a leak would cause damage to the structure. The pan drains by an indirect waste pipe not less than 3/4 inch in diameter, discharging to an approved indirect waste receptor or extending to the building exterior.

Two straps: one in the upper third and one in the lower third of the tank's height, with the lower strap located at least 4 inches above the tank's controls.

At least 1 square inch of free area per 1,000 Btu/h of total appliance input, minimum 100 sq in per opening, with one opening starting within 12 inches of the enclosure's top and one within 12 inches of the bottom.

Lavatory: 3/8 inch minimum. Water closet with a flush valve (flushometer): 1 inch minimum. A tank-type water closet needs only 3/8 inch.

By converting each fixture to water supply fixture units (WSFU) and applying the demand curve in IPC 604.3 (based on Hunter's curve) to find design flow, then sizing pipe for that flow at an acceptable velocity.

A reduced-pressure zone (RPZ) assembly protects against high-hazard, health-hazard backpressure and backsiphonage. A double-check (DC) assembly is rated only for low-hazard, non-health conditions.

At least twice the diameter of the effective opening, and never less than 1 inch, measured from the outlet to the flood-level rim of the fixture.

Any actual or potential physical connection between the potable water supply and a source of contamination or pollution (IPC 608.1); each one must be protected by a backflow preventer sized to the degree of hazard.

A non-removable hose-bibb-type backflow preventer or an atmospheric vacuum breaker, since an attached hose can create a submerged inlet and a backsiphonage path.

When static water pressure exceeds 80 psi, an approved pressure-reducing valve with strainer must reduce building distribution pressure to 80 psi or less.

On fixture supplies with quick-closing valves, such as dishwashers, clothes washers, and flushometer valves, sized and located per the manufacturer's instructions or ASSE 1010.

They must be third-party certified to NSF/ANSI/CAN 61 for contact with drinking water (IPC 605.1), in addition to conforming to the listed material standards in Tables 605.3 and 605.4.

By distinct color, typically purple or violet, and labeling such as 'CAUTION: NONPOTABLE WATER — DO NOT DRINK,' marked at regular intervals so it cannot be mistaken for the potable system.

Private water closet: 3 DFU. Public water closet: 4 DFU (both rated at 1.6 gallons per flush).

Lavatory: 1 DFU. Kitchen sink, bathtub, shower, and floor drain: 2 DFU each.

5 DFU total for the group, per IPC Table 709.1.

2.5 inches and smaller: 1/4 inch per foot (2%). 3 to 6 inches: 1/8 inch per foot (1%). 8 inches and larger: 1/16 inch per foot (0.5%).

1/4 inch per foot (2% slope) — the standard small-pipe slope is required no matter the pipe diameter, to keep grease moving before it cools and solidifies.

At intervals not exceeding 100 feet, plus at each change of direction greater than 45 degrees, at the base of each stack, and near the building drain/building sewer connection.

When the fixtures served are at an elevation lower than the elevation of the manhole cover of the next upstream manhole in the public sewer, making the branch subject to backflow during a surcharge.

It must be trapped, vented, and accessible, and receive the discharge through an air gap or air break rather than a direct sewer connection — used for equipment like dishwashers, ice machines, and steam equipment.

The sump must be gastight with a vented, sealed cover, and the ejector must be sized to handle the anticipated discharge and pass solids typical of sewage.

At least one-half the diameter of the drain it serves, but never smaller than 1-1/4 inch.

The total fall caused by the fixture drain's slope cannot exceed the diameter of the fixture drain — once that allowable fall is used up, the vent connection must occur.

Self-siphoning fixtures, such as water closets — their high discharge velocity clears the trap without relying on a limited vent distance, so the IPC places no developed-length limit on them.

A vent pipe that also serves as the drain for one or more fixtures, commonly a bathroom group, sized to handle both the venting function and the DFU load it carries.

A single vent connecting two fixture drains at the same level, such as back-to-back or side-by-side fixtures; it is sized for the larger of the two drains it serves.

It must be installed at least 4 inches above the horizontal branch or fixture drain served, remain accessible, and cannot serve as the sole vent for the entire building — a vent must still extend to open air.

Any vent with a developed length exceeding 40 feet must be increased one nominal pipe size for its entire developed length.

Not less than 2 inches and not more than 4 inches, deeper only for special accessible-fixture designs, per IPC 1002.4.

S-traps are prohibited because they self-siphon. Each fixture must have its own trap, with very limited exceptions for specifically permitted combination fixtures.

Total DFU of connected fixtures multiplied by the flow rate in gpm and the required retention time. Hydromechanical units are instead sized to ASME A112.14.3/.4, CSA B481.3, or PDI G101.

A solids interceptor, sized and rated for the grinder's discharge, to separate solids before the flow reaches the grease interceptor.

They must also comply with NFPA 99, in addition to the IPC's special piping and storage-system provisions inspected under this domain.

The 100-year, 1-hour rainfall rate for the site, from IPC Figure 1106.1/Appendix B or approved local weather data, applied against the flow-rate limits in Table 1106.2 (horizontal) and Table 1106.3 (vertical leaders).

Independently, at the same design rainfall rate, while assuming the primary drains are completely blocked — flow through the primary system is not credited when sizing the secondary system.

At a location separate from the primary drainage piping and clearly observable, such as a through-wall scupper or an overflow drain terminating to daylight — never tied into the primary storm system.