Exam Cheat Sheet · Quick Reference
Kansas Master Plumber with Gas Exam (ICC KGF, 2018 IPC/IFGC)
Kansas · Pearson Vue
Kansas State Portion 100 questions
Key Distinctions
A stack vent is the extension of a soil or waste stack above the highest horizontal drain connected to that stack, while a vent stack is a vertical vent pipe installed primarily to provide circulation of air to and from the drainage system.
IPC 2018 Chapter 2 — Section 202, definitions of Stack Vent and Vent StackHorizontal pipe is any pipe or fitting making an angle of less than 45 degrees with a horizontal plane (e.g., piping at 40 degrees), whereas vertical pipe makes an angle of 45 degrees or more with the horizontal.
IPC 2018 Chapter 2 — Section 202, definitions of Horizontal Pipe and Vertical PipeWater service pipe runs from the water main or other potable source — or from the meter only where the meter is at the public right of way — to the water distribution system of the building, so when the meter is inside the structure the service pipe extends all the way to the building's distribution system.
IPC 2018 Chapter 2 — Section 202, definitions of Water Pipe (Water service pipe and Water distribution pipe)An appurtenance is an adjunct device that demands no additional water supply and adds no discharge load to a fixture or the drainage system; devices dependent on energized components are plumbing appliances.
IPC 2018 Chapter 2 — Section 202, definitions of Plumbing Appurtenance and Plumbing ApplianceA full-open valve is required at the base of every water riser pipe in occupancies other than multiple-family residential occupancies two stories or less in height and one- and two-family residential occupancies (e.g., a four-story office building), while individual fixture connections require shutoff valves under 606.2; no valve is required at branch connections on each floor or at the midpoint of the riser.
IPC 2018 Section 606.5.1The double check assembly (ASSE 1015, AWWA C510, CSA B64.5/B64.5.1) is rated for low hazard only but protects against both backpressure and backsiphonage, while the pressure vacuum breaker (ASSE 1020, CSA B64.1.2) protects against backsiphonage only.
IPC 2018 Section 608.1, Table 608.1Both are prohibited traps under IPC 1002.3, but the S-trap has no exception, whereas drum traps are permitted as solids interceptors and when serving chemical waste systems.
IPC 2018 Section 1002.3ASSE 1018 applies to potable water-supplied trap seal primer valves (1002.4.1.1), while ASSE 1072 applies to barrier-type floor drain trap seal protection devices (1002.4.1.4); ASSE 1044 covers waste water-supplied trap primer devices (1002.4.1.3).
IPC 2018 Section 1002.4.1.1Under the longest length method every section and branch is sized from the table row for the system's longest run (e.g., a 12-ft branch still uses the 70-ft row), while under the branch length method each branch is sized using its own length measured from the meter (e.g., a branch 50 ft from the meter uses the 50-ft row, giving 3/4 inch where the 90-ft longest-length row would require 1 inch).
IFGC Section 402.4.1, Longest Length Method; Table 402.4(2), Schedule 40 Metallic Pipe (natural gas, 0.5 in. w.c. drop)For an application, the code official may grant one or more extensions of not more than 180 days each upon written request with justifiable cause, whereas permit extensions under 106.5.4 may be granted only once.
IPC 2018 Chapter 1 Scope and Administration — Section 106.3.3 Time Limitation of ApplicationIn malls the path of travel from the main entrance of the store or tenant space shall not exceed 300 feet (and facilities shall be not more than one story above or below the space served), while the 500-foot limit applies to occupancies other than malls.
IPC 2018 Chapter 4, Section 403.3.4 (Location of Toilet Facilities in Malls)Urinals shall not be substituted for more than 67 percent of required water closets in assembly and educational occupancies, while the limit is 50 percent in all other occupancies.
IPC 2018 Section 424.2Separate facilities are not required in business occupancies with a maximum occupant load of 25 or fewer, while the general exception threshold is 15; at an occupant load of 30 neither exception applies and separate facilities for each sex are required.
IPC 2018 Section 403.2 Exception 4Key Terms
Formulas to Know
cfh = total connected Btuh ÷ 1,000; e.g., (50,000 + 40,000 + 100,000) ÷ 1,000 = 190 cfh at the meter, and 40,000 + 35,000 + 100,000 = 175,000 Btuh = 175 cfh for a main sectionBtuh = table capacity in cfh × 1,000 Btu per cu ft; e.g., 247 cfh = 247,000 Btuh, 44 cfh = 44,000 Btuh, 117 cfh = 117,000 BtuhSpare cfh = table capacity at that length − demand; e.g., 170 cfh − 60 cfh = 110 cfh spare, and 137 cfh − 135 cfh = 2 cfh marginUse the next table row equal to or longer than the run: 15 ft → 20-ft row, 35 ft → 40-ft row, 95 ft → 100-ft row, 110 ft → 125-ft row, 140 ft → 150-ft row; then pick the smallest size whose capacity equals or exceeds demandSize every main section and branch from the table row for the system's longest run, not the branch's own length; e.g., a 12-ft branch carrying 40 cfh uses the 70-ft row where 1/2 inch carries 60 cfhSize each branch using its own length from the meter (main run length + branch length); e.g., 15 ft main to tee 1 + 8 ft branch = 23 ft → 30-ft row; the most remote outlet's length (longest of all outlet lengths) sizes the main sections feeding itMaximum distance downstream of the drainage stack = 10 × diameter of the drainage stack; for a 4-inch stack, 10 × 4 in. = 40 inchesDFU = gpm × 2 (1 gpm of flow is equivalent to two drainage fixture units)Divide total occupant load in half, then divide by the Table 403.1 ratio; e.g., restaurant with 150 occupants: 150 ÷ 2 = 75 females, 75 ÷ 75 per water closet = 1 water closetThreaded CPVC pressure rating = rated pressure × 50% reduction, and the pipe wall thickness shall be not less than Schedule 80Radius = greater of 30 pipe diameters or the minimum coil radius