Home, explainedA Completa video series
Short animated films about the parts of a home most people never see: what each one does, why it matters, and when it’s time to call a pro.
Latest episode
Episode 04 · The P-trap · 1 min
How the water held in the bend under your sink keeps sewer gas out of your home, and how a vent protects that seal.
Homeowner tip
A sink nobody uses, like one in a guest bath, can slowly lose that water. Run the tap for a few seconds now and then to refill the seal.
When to call a pro
Still smell sewer gas after running the tap, or see a leak under the sink? Have a plumber take a look.
Plumbing on CompletaAbout the series
Each film follows one hidden piece of the house, from what you can see to what sits inside the wall or under the cabinet.
The animations are explanatory cutaways, not installation drawings. Color stands in for things you can’t see, and slow changes are sped up.
Every episode lists the published sources behind it. Spot a mistake? Our editorial policy explains how we correct it.
The narrator is an AI-generated voice, not a recording of a real person.
Sources
Keep in mind: The film is a simplified cutaway, not installation guidance. Sewer gas is drawn as amber particles so you can see it; the real gas is invisible. Evaporation is sped up.
Browse the home services on Completa, or download the app to start a project.
