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.

Type P&IDNorme ANSI/ISA-5.1-2009 + ISO 10628-1:2014Moteur schematex-pidMis à jour 24/09/2026

La demande

“A house plumbing diagram with a cold-water main and main shutoff, a water heater, and hot and cold lines to a kitchen sink, bathroom sink, and shower.”

Essayez ensuiteAdd a toilet cold-water branchAdd isolation valves at each fixture

Ce que contient ce dessin

Comprenez les décisions qui le sous-tendent.

01Main isolation

Put a shutoff directly after the cold-water entry.

02Water heating

Feed the heater from the cold main.

03Fixture branches

Show hot and cold services where appropriate.

04Pipe size

Label the main and fixture branch sizes.

Use this as a supply schematic; pair it with a floor plan for actual routing and dimensions.

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FAQ

Questions fréquentes

What does this diagram show?

It shows the logical cold and hot water connections to several fixtures.

Does it show drain lines?

No. This example is limited to water supply plumbing.

Why label pipe sizes?

Sizes help communicate the intended main and branch arrangement.