Fixtures & Fixture Fittings — Plumber Practice Questions

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• Under the IPC, what is the minimum dimension from the centerline of a water closet to the nearest side wall, partition, vanity, or other obstruction?
• The IPC requires a minimum clear space measured from the front of a water closet, urinal, lavatory, or bidet to any wall, fixture, or door. What is that minimum?
• What minimum centerline-to-centerline spacing does the IPC require between adjacent fixtures such as two wall-hung urinals?
• The IPC requires accessible plumbing fixtures where fixtures are required, but the detailed accessible clearances, heights, and grab bar locations come from which referenced document?
• Applying the minimum plumbing facilities table to an occupant load produces 3.2 required water closets for one sex. How does the IPC require that fractional result to be handled?
• In assembly and educational occupancies, what is the maximum share of the required water closets that the IPC permits urinals to replace?
• What is the maximum water consumption per flush that the IPC permits for a water closet?
• The existing water closets consume 3.5 gallons per flush and the replacements consume 1.6 gallons per flush, both values given. The restroom logs 220 flushes on a typical school day. How many gallons per day does the swap save?
• When nonwater urinals are installed, what does the IPC require to be provided at each urinal location?
• The IPC requires tempered water to be delivered to public hand-washing facilities. What temperature range does the code define as tempered water?
• Each public lavatory is served by a metering faucet that delivers 0.25 gallon per metering cycle, given. During a halftime rush, 12 lavatories each cycle 30 times. How much water is delivered in total?
• What is the minimum interior cross-sectional area the IPC requires for a shower compartment?
• Which type of control valve does the IPC accept for an individual shower, with maximum setting limited to 120 degrees F?
• The shower receptor floor must pitch toward the drain at a uniform 1/4 inch per foot, given. The drain sits 42 inches from the back wall of the receptor. How much higher than the drain must the bed be at that wall?
• What does the IPC require regarding the circulation pump once a whirlpool bathtub is enclosed?
• Which part of the IPC do you open to determine whether a service sink is required for a given occupancy and occupant load?
• How does the IPC treat water dispensers relative to the required number of drinking fountains?
• What does the IPC require for a floor drain trap that is subject to losing its seal through evaporation?
• How does the IPC require a floor-outlet water closet to be secured and finished where the fixture meets the floor?
• What does the IPC require for a domestic food waste grinder installed at a kitchen sink?
• Table 403.1 sets the minimum number of plumbing fixtures based on the number of occupants served. Under the IPC, how is that occupant load established for a given space?
• The minimum plumbing facilities table is organized by occupancy classification. Which classification row governs the required fixture counts for the dining room and bar area of a full-service restaurant?
• Each of the two toilet rooms in this suite is designed for use by one occupant at a time and has a door that can be locked from within. Under the IPC, how may the fixtures in those rooms be credited against the required fixture counts?
• The IPC generally requires separate toilet facilities to be provided for each sex, and then lists specific situations in which one facility may serve everyone. Which situation is one of those listed exceptions?
• A warehouse has employees working the floor and a counter area where drivers and vendors are received. Under the IPC, how must toilet facilities be provided for this building?
• Using the minimum plumbing facilities table for a one-family dwelling, which set of fixtures represents the minimum that must be provided in the dwelling unit?
• A lavatory is being trimmed out and the waste fitting is being checked. What is the minimum size of the waste outlet the IPC requires for a lavatory?
• A bathtub is being replaced by a shower, and the crew wants to reuse the existing tub waste and trap. What is the smallest waste outlet the IPC allows on the new shower?
• Six shower heads in one gang shower room will be supplied from a common hot and cold branch. Under the IPC, how must the discharge temperature at those shower heads be controlled?
• A floor-outlet water closet is being connected to the closet flange on the drainage piping. What does the IPC require of that connection?
• The IPC lists fixture designs that are not permitted to be installed. Which water closet design falls into that prohibited category?
• A public toilet room in a commercial building is being roughed in. Under the IPC, in which situation must a floor drain be provided in that toilet room?
• A flushometer valve serving a water closet connects the potable supply directly to a fixture that can be full of contaminated water. Under the IPC, how must that connection be protected?
• A water closet in an existing building has cracked and is being replaced. What does the code require of the flush volume of the replacement fixture?
• A single cold water branch will serve four flushometer water closets, four public lavatories and two flushometer urinals. Take these demand values as given data: each flushometer water closet 10 water supply fixture units, each lavatory 1.5 water supply fixture units, and each flushometer urinal 5 water supply fixture units. What total demand in water supply fixture units does that branch carry?
• A concourse restroom holds six flushometer water closets and four flushometer urinals. Take these consumption values as given: each water closet uses 1.28 gallons per flush and each urinal uses 0.5 gallon per flush. On an event day each water closet is flushed 90 times and each urinal is flushed 140 times. Approximately how much water does the restroom use that day?
• A flushometer water closet on the top floor requires 25 psi flow pressure at the fixture, given. Static pressure at the meter is 68 psi, the fixture sits 46 feet above the meter, and friction plus meter losses along the path total 14 psi. Using 0.433 psi per foot of elevation, what pressure remains available at that fixture?
• A shower receptor is being built up with a sheet membrane liner before the mortar bed and tile are installed. What does the plumbing code require of that liner where it meets the walls of the compartment?
• A shower compartment is being fitted with a ceiling rain head, a hand shower on a hose and four body sprays, all served by one valve and used in the same compartment. How does the plumbing code treat the flow from that arrangement?
• A gang shower room has five shower heads that all run at once for 8 minutes after practice. Take these values as given: each head delivers 2.5 gallons per minute of blended water, and the blend is 70 percent hot water. How many gallons of hot water does that 8 minute period consume?
• A restroom's water closets are dual flush units. Take these values as given: a full flush uses 1.6 gallons, a reduced flush uses 1.1 gallons, the closets are flushed 400 times in a day, and 70 percent of those flushes are reduced flushes. How much water do they use in that day?
• A bathtub is being installed and its waste and overflow assembly is being connected to the fixture drain. Under the IPC, what is the minimum size of the waste outlet serving that bathtub?
• A whirlpool bathtub is being installed and the circulation pump has to be positioned before the tub deck is framed. Where does the plumbing code require that pump to be located?
• A single-occupant toilet room has been built on the kitchen wall of a restaurant, and its door opens directly into the area where food is prepared for the customers. The owner points out that the door is tight-fitting and self-closing. How does the plumbing code treat that arrangement?
• A public restroom's required water closet count has been established from the minimum plumbing facilities table. How is the required number of lavatories for that restroom determined?
• A restroom is required to provide accessible plumbing fixtures. How do those accessible fixtures relate to the minimum number of fixtures the facilities table requires?
• A powder room layout places the centerline of the water closet 14 inches from the side of an adjacent vanity cabinet, and 15 inches from the finished side wall on the other side. Under the IPC clearance requirements for fixtures, what is the status of that layout?
• A shower compartment is proposed at 28 inches by 34 inches of interior finished dimension. Take these limits as given: the compartment must provide not less than 900 square inches of interior cross-sectional area and must be capable of encompassing a 30-inch circle. What is the status of that proposal?
• A floor-outlet water closet is being set after the finished floor has been installed. Where must the closet flange sit in relation to that finished floor?
• The minimum plumbing facilities table requires a service sink for a tenant space. Which installation satisfies that requirement?

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