Your house doesn't have one plumbing system. It has two, running through the same walls, kept apart by a gap of air. This is how plumbing works in a house: where the water comes in, where it goes, where it breaks, and what it costs you.

0:00 Your House Has Two Plumbing Systems
0:44 Water Pressure: Why the House Downhill Wins
1:28 The Main Shutoff Valve: Find It Before You Need It
1:50 How Your Water Heater Gets Its Pressure
2:28 Why Your Shower Turns Hot When Someone Flushes
3:08 Backflow and the Air Gap You See Every Day
3:56 The P-Trap: Why Your Toilet Is Never Empty
4:34 Vents and Drain Slope: How Your Drains Breathe
5:29 High Water Pressure: What Happens Above 80 PSI
6:08 Leaks and Burst Hoses: Five Bathtubs a Day
7:08 Galvanized and Polybutylene: Pipes That Fail From Inside
8:10 Water and Sewer Lines: More Pipe Than You Think You Own

Pipe & Panel explains how your house actually works, from the pipes to the panel. This video explains how the system works; it is not repair advice. Codes and ownership rules vary by location.
#plumbing , #homeownership