Plumbing Drain System

Plumbing Drain Systems

IRC Sections

2600

2700

3000

General

P2601.2

Home must be connected to sanitary drainage system

P2603.2.1

Protection against damage

P2603.3.1

Penetrations

P2603.4

Pipes through foundation walls

P2603.5

Freezing

General Installation Requirements

P2604.1

Trenching and bedding

P2604.2

Water service and sewer in same trench

P2604.3

Backfilling

P2604.4

Protection of footings

P2605.1

Supports

P2606.1

Sealing of annular spaces

P2607

Waterproofing of openings

P3008

Sewage backflow and backwater valve requirements

Spacing Chart for Different Materials (spacing in feet)

Material                                                                                                    Max Horizontal ft         Max Vertical ft

PVC

4

10

CPVC  1 inch or smaller

3

10

PEX     1 inch or smaller

2.67

4

PEX    1 ¼ inch or larger

4

10

COPPER (1 ¼ inch or smaller)

6

10

COPPER  (1 ½  inch or larger)

10

10

Drain pipe requirements

P3003.9.2

Purple primer not required on glued pipe (not pressurized)

P3003.13

Joints between different materials

P3005.1

Drainage fittings and connections

Table

P3003.2

Prohibited joint  connections (no glued abs to pvc)

P3005.2 thru

P3005.6

Clean out requirements

(notes where required, direction changes and sizes

P3005.3

Required horizontal slope

P3005.4.2

Building drain and sewer size and slope

table

P3005.4

Drain pipe sizing

P3006

Sizing of drain pipe off sets

Drainpipes for individual fixtures or sinks

P2706

Strainer/basket required for drain receptors

P2706.1.2

Standpipes (min 18” max 42”)

P2706.1.2.1

Washing machine standpipe (minimum 30 “)

P2706.2

Prohibited waste receptors

P2707.1

Directional fitting or tailpipe required for disposal or dishwasher