Sanitary Drainage

Backwater Valves Protect Fixtures Below the Upstream Sewer Manhole

When is a backwater valve required in a basement bathroom?

P3008.1

Cleanouts Must Be Placed Where Drains Can Be Rodded

Where are plumbing cleanouts required in a house?

P3005.2

Drain Pipe Size Depends on Fixture Units and Minimum Fixture Sizes

What size drain pipe do I need for a bathroom or kitchen fixture?

P3005.4

Drainage Fittings Must Guide Waste in the Direction of Flow

Can I use a sanitary tee on its back for a drain?

P3005.1

Floor Drains Need Traps, Venting, Slope, and Trap Seal Protection

Are floor drains required or allowed in a residential garage or basement?

P3005.1

Horizontal Drainage Pipe Needs Minimum Slope to Carry Solids

What slope is required for residential drain pipe?

P3005.3

Indirect Waste Needs an Air Gap or Air Break to an Approved Receptor

What is an indirect waste and when is it required?

P3005.1.6

Island Sink Drainage Must Coordinate the Loop Vent and Cleanouts

How do you vent a kitchen island sink under IRC?

P3005.2.9

The Building Drain Connects the House Drainage System to the Building Sewer

What is the difference between a building drain and building sewer?

P3001.1

Wet-Vented Bathroom Drains Must Follow Fixture and Order Limits

Can a toilet, shower, and lavatory share a wet vent?

P3005.1