House Water Supply Plumbing Diagram
This residential plumbing schematic traces cold water from the building main through the primary shutoff. One branch feeds the water heater and the remaining cold-water branches feed the kitchen sink, bathroom sink, and shower. The heater outlet then supplies hot water to the same fixtures. Labels distinguish the 3/4-inch main from the 1/2-inch fixture branches. The drawing focuses on how the supply system connects rather than the physical path through walls and floors. It is useful for explaining a small remodel or organizing a discussion with a plumber. It does not replace a code-compliant permit drawing. Add fixture stops, backflow protection, drainage, venting, pipe materials, and actual routing as the project requires.
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Scenario
A homeowner or contractor needs a simple schematic of fixture supply branches.
Key decisions
- Main isolation: Put a shutoff directly after the cold-water entry.
- Water heating: Feed the heater from the cold main.
- Fixture branches: Show hot and cold services where appropriate.
- Pipe size: Label the main and fixture branch sizes.
When to reuse this
Use this as a supply schematic; pair it with a floor plan for actual routing and dimensions.
Frequently asked questions
What does this diagram show?
Does it show drain lines?
Why label pipe sizes?
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