'Drains need air to maintain flow, so they're connected to these outlets on the roof'
vents
PLUMBING: Drains need air to maintain flow, so theyre connected to these outlets on the roof
Drains need air to maintain flow, so they're connected to these outlets on the roof
Drains need air to maintain flow, so they're connected to these outlets on the roof
PLUMBING
vents
PLUMBING