Plumber Red Seal · Question
What is the maximum permitted horizontal spacing between cleanouts on a 4-inch sanitary drainage pipe?
The NPC specifies maximum distances between cleanouts to allow for effective cleaning of the pipe. For pipes 4 inches in diameter and larger, the maximum spacin
Start free practice for Plumber Red Seal
177 questions · no signup required · 40 free questions per day
Question: What is the maximum permitted horizontal spacing between cleanouts on a 4-inch sanitary drainage pipe?
Answer options:
- 15 m (50 ft)
- 23 m (75 ft) ✅ 30 m (100 ft)
- 45 m (150 ft)
Correct answer: 30 m (100 ft)
Explanation: The NPC specifies maximum distances between cleanouts to allow for effective cleaning of the pipe. For pipes 4 inches in diameter and larger, the maximum spacing is 30 metres (approximately 100 feet).
Start free practice for Plumber Red Seal
177 questions · no signup required · 40 free questions per day
More about Plumber Red Seal
Related Questions
- Before starting a new plumbing installation in a residential basement, what is the primary reason why a plumbe
- A plumber is installing a new kitchen sink in an existing residential dwelling. The sink drain is connected to
- A plumber is installing drainage for a dishwasher in a residential kitchen. The dishwasher P-trap is located 1
- A plumber is asked to install a backflow prevention assembly on a lawn irrigation system connected to the pota
- A plumber is considering the velocity of water in a 50 mm (2") copper pipe supplying a commercial building. Ex
- A plumber is designing the domestic hot water recirculation system for a multi-story residential building. Wha
More for Plumber Red Seal candidates
Practice tests
Question explanations
- Before starting a new plumbing installation in a residential basement, what is the primary reason why a plumbe
- A plumber is installing a new kitchen sink in an existing residential dwelling. The sink drain is connected to
- A plumber is installing drainage for a dishwasher in a residential kitchen. The dishwasher P-trap is located 1
- A plumber is asked to install a backflow prevention assembly on a lawn irrigation system connected to the pota
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Plumber Red Seal Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.