"Lot Drain Inlet, Drain Connector and Water Outlet" is lesson 4 of 6 in the Manufactured Housing (C-47) Learning Hub. It opens with "Your Scope: Utility Connections to the Home" and works through 5 short steps, then a worked example you can check yourself against.
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Steps in this lesson
Your Scope: Utility Connections to the Home
The Lot Drain Inlet
The Drain Connector
The Water Service Outlet
Backflow, Relief Valve and Park Sizing
The worked example in the course applies this lesson to a realistic job in 5 steps, from "Fixture units" through "Water outlet check".
What you'll be able to do
Explain the main idea of "Lot Drain Inlet, Drain Connector and Water Outlet" in plain language you can use on the exam.
Apply this step with confidence: "The Drain Connector".
Apply this step with confidence: "The Water Service Outlet".
Apply this step with confidence: "Backflow, Relief Valve and Park Sizing".
Test yourself on the worked example and the quick-check quiz inside the classroom.
The diagram for this lesson, exactly as it appears in the Learning Hub.
The first steps of this lesson
Step 1: Your Scope: Utility Connections to the Home
16 CCR 832.47(b) in the License Law book says a C-47 contractor may provide utility services on a single-family individual site placement, meaning the connection of gas, water, sewer and electrical utilities to the home. The 2025 California Plumbing Code Appendix E prints the plumbing rules for manufactured home parks. It states that the appendix is not mandatory unless a state agency adopts it or the adopting ordinance references it, so confirm with the enforcing agency, but it is the California text for lot connections.
Step 2: The Lot Drain Inlet
CPC E 301.2.1 assigns each lot drainage inlet a waste loading of 12 drainage fixture units (DFU), and drainage laterals must be at least 3 inches. E 301.3.1 puts the inlet in the third rear section of the lot and within 4 feet of the proposed home location. E 301.3 says the inlet must be pluggable or cappable when no home is on the lot, surface drainage must be diverted away from it, and the rim extends a maximum of 4 inches above ground.
The remaining 3 steps, the worked example and the quiz are in the course. This is a preview. The full lesson, with the step-by-step explanations, a worked example and a quick-check quiz, is inside the classroom.
Independent exam preparation. Contractors Classroom is not affiliated with the Contractors State License Board, and no course can guarantee a passing result.
