Stop guessing your bathroom plumbing layout — this is what a professional rough-in actually looks like. This cutaway diagram shows a complete residential bathroom plumbing system from fixture to main drain. The 3-inch toilet waste lines connect into a 4-inch main drain for strong, reliable discharge. The sink runs on a 1½-inch trapped drain tied correctly into the stack, while the shower line connects separately to maintain proper flow. You can also see the hot and cold supply lines routed clean
0:43
Stop guessing your bathroom plumbing layout — this is what a professional rough-in actually looks like. This cutaway diagram shows a complete residential bathroom plumbing system from fixture to main drain. The 3-inch toilet waste lines connect into a 4-inch main drain for strong, reliable discharge. The sink runs on a 1½-inch trapped drain tied correctly into the stack, while the shower line connects separately to maintain proper flow. You can also see the hot and cold supply lines routed clean
1.1K views8 months ago
TikTokpluminghome
See more
Static thumbnail place holder