Massachusetts Plumbing Code ACTUAL EXAM
2025/2026 EXPERT VERIFIED QUESTIONS WITH
DETAILED ANSWERS| GUARANTEED PASS
How far can a trap arm go 1 1/2" 2" 3" 4" - answer-5' 6' 8' 10'
What is the maximum water pressure going into a residential dwelling -
answer-80 psi
What is the smallest drain piping allowed underground - answer-2"
What's the minimal size vent going through a roof - answer-2"
What is the minimal size piping for drainage going through a foundation wall -
answer-4"
What is the minimal size water main underground - answer-3/4"
How far should a dwv vent go through the roof - answer-18-24"
,What is the max temp for a shower head - answer-112 degrees
What is the maximum distance for a common vent at different levels - answer-
10"
What is the minimal liquid trap seal - answer-2"
What must be stamped on the lip of every S.U. Gasket - answer-ASTM, SV or
XH neoprene, manufactures name
How do you calculate the size of an air gap - answer-It must be at least twice
the size of the diameter of the drain it serves
(into a receptor, sink, floor drain, or inlet side of a trap)
What is the minimal pounds of grease per gallon of flow - answer-2 pounds
Minimal size water heater that requires a safe pan - answer-6 gallons
what is the multiplier for a 45 degree offset - answer-Rise x 1.414 = offset
, How many pounds in a gallon of water - answer-8.33 lbs
How many gallons in a cubic foot of water - answer-7.5
How much does a square foot of water weigh - answer-62.5 lbs
Area of a triangle formula - answer-A=1/2bh (bxh divide by 2)
What temperature does water boil at - answer-212 degrees Fahrenheit
What temperature does water freeze at - answer-32 degrees Fahrenheit
Minimal drip leg length - answer-3 inches
Maximum length for fixture supply lines - answer-30"
Max length for commercial flexible gas connector - answer-6 feet
Minimal drip leg length - answer-3 inches
In a 4 inch building drain how far apart max can clean outs be - answer-50 feet
2025/2026 EXPERT VERIFIED QUESTIONS WITH
DETAILED ANSWERS| GUARANTEED PASS
How far can a trap arm go 1 1/2" 2" 3" 4" - answer-5' 6' 8' 10'
What is the maximum water pressure going into a residential dwelling -
answer-80 psi
What is the smallest drain piping allowed underground - answer-2"
What's the minimal size vent going through a roof - answer-2"
What is the minimal size piping for drainage going through a foundation wall -
answer-4"
What is the minimal size water main underground - answer-3/4"
How far should a dwv vent go through the roof - answer-18-24"
,What is the max temp for a shower head - answer-112 degrees
What is the maximum distance for a common vent at different levels - answer-
10"
What is the minimal liquid trap seal - answer-2"
What must be stamped on the lip of every S.U. Gasket - answer-ASTM, SV or
XH neoprene, manufactures name
How do you calculate the size of an air gap - answer-It must be at least twice
the size of the diameter of the drain it serves
(into a receptor, sink, floor drain, or inlet side of a trap)
What is the minimal pounds of grease per gallon of flow - answer-2 pounds
Minimal size water heater that requires a safe pan - answer-6 gallons
what is the multiplier for a 45 degree offset - answer-Rise x 1.414 = offset
, How many pounds in a gallon of water - answer-8.33 lbs
How many gallons in a cubic foot of water - answer-7.5
How much does a square foot of water weigh - answer-62.5 lbs
Area of a triangle formula - answer-A=1/2bh (bxh divide by 2)
What temperature does water boil at - answer-212 degrees Fahrenheit
What temperature does water freeze at - answer-32 degrees Fahrenheit
Minimal drip leg length - answer-3 inches
Maximum length for fixture supply lines - answer-30"
Max length for commercial flexible gas connector - answer-6 feet
Minimal drip leg length - answer-3 inches
In a 4 inch building drain how far apart max can clean outs be - answer-50 feet
