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Sewer Lateral / Building Drain Installation Certificate

A Sewer Lateral / Building Drain Installation Certificate documents the installation of the underground drain line from the building to the public sewer or septic system, including pipe material, sizing, slope, bedding, and cleanout/manhole provision.

IPC sanitary drainage provisions (Chapter 7), state/local plumbing codesValid: One-off (no expiry)

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Sample Sewer Lateral Install certificate

Sample Sewer Lateral / Building Drain Installation Certificate certificate created with CertBox, showing the professional PDF layout with pipe material, size, and measured slope, bedding and backfill compliance, cleanout count and spacing

Sample Sewer Lateral Install with fictional data. All personal details shown are fake.

What it covers

  • Pipe material, size, and measured slope
  • Bedding and backfill compliance
  • Cleanout count and spacing
  • Manhole provision on 8-inch and larger sewers

Who needs a Sewer Lateral Install?

General contractors
Plumbers
Building inspectors
Homeowners (for records)

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Frequently asked questions about Sewer Lateral Install

What slope does a sewer lateral need?
Under IPC Table 704.1, pipe 2 1/2 inches or less needs a minimum 1/4 inch per foot slope, pipe 3 to 6 inches needs 1/8 inch per foot, and pipe 8 inches or larger needs 1/16 inch per foot.
How far apart do cleanouts need to be?
Building sewers smaller than 8 inches need a cleanout at least every 100 feet, plus one at each change of direction greater than 45 degrees. Sewers 8 inches and larger use manholes instead, at intervals of up to 400 feet.

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