General Regulations & Safety
This is the minimum depth, in inches, that exterior water supply system piping must be installed below grade
What is 12 inches
This is the minimum required clearance, in inches, in front of a water closet, bidet, or lavatory to any wall, fixture, or door
What is 21 inches?
These must be installed at the bottom of each tank-type water heater for the purpose of emptying the vesse
What are drain valves?
This is the minimum diameter allowed for a water service pipe
What is 3/4 inch?
This is the minimum slope per foot required for horizontal drainage pipe that is 2.5 inches or smaller in diameter
What is 1/4 inch per foot?
This type of protective plate must be used in concealed locations when piping (other than cast iron or galvanized steel) is installed through holes in studs less than 1.25 inches from the edge
What is a steel shield plate
To ensure sanitary conditions, the IPC specifically prohibits the installation of drinking fountains, water coolers, and water dispensers in these rooms
What are public restrooms?
Temperature and pressure (T&P) relief valves must have a temperature setting that does not exceed this many degrees Fahrenheit
What is 210°F
This color is used to identify reclaimed, rain, and graywater distribution systems and their associated identification tape
What is purple?
The primary function of this system is to protect every trap against the loss of its seal
What is the venting system?
For plastic sewer piping, this insulated copper conductor must be installed adjacent to and over the full length of the piping for location purposes
What is a tracer wire
This is the maximum allowed temperature, in degrees Fahrenheit, for water discharged from a bidet fitting
What is 110°F
A level working space of at least this size, in inches (length by width), must be provided in front of the control side to service a water heater
What is 30 inches by 30 inches?
An approved pressure-reducing valve is required when the static water pressure within a building exceeds this many psi
What is 80 psi?
These types of joints for stainless steel drainage systems must be made with an approved elastomeric seal
What are O-ring joints?
Trenching installed parallel to these building elements shall not extend into their bearing plane, which is defined by a 45-degree angle from their outside bottom edge
What are footings and walls
In employee and public toilet facilities, this specific fixture is required to be located in the same room as the water closet
What is a lavatory
The temperature relief valve sensing element must be located within this many inches of the top of the water heater tank
What is 6 inches
When water service and building sewer pipes are in the same trench and not constructed of specific materials, they must be horizontally separated by at least this many feet of undisturbed earth
What is 5 feet?
Every dry vent must rise vertically to a point not less than this many inches above the flood level rim of the highest fixture being vented
What is 6 inches?
According to Table 308.5, this is the maximum horizontal hanger spacing, in feet, allowed for 1-inch and smaller CPVC pipe
What is 3 feet?
When used for shower lining, this material must weigh at least 4 pounds per square foot and be coated with asphalt paint
What is sheet lead
These specific safety devices must be installed on bottom-fed water heaters to prevent the tank from siphoning
What are vacuum relief valves?
The developed length of hot or tempered water piping from the source of heated water to the fixtures shall not exceed this distance
What is 50 feet?
Soil and waste stacks in buildings having more than this many branch intervals must be provided with a relief vent at every tenth interval
What is 10 branch intervals?