Concrete tank being delivered - Septic Tank Diagram

Tank installed

Access risers and lids on tank

Sanitary tee inside septic tank

Traffic rated manhole covers installed over a traffic rated septic tank in a paved area

Steel Tank Being Installed

PVC SDR 35 sewer pipe is commonly used for both solid and perforated piping throughout the system

Distribution box and piping connected

Distribution box set level

Brick-lined pit being abandoned. ISDS Abandonment Procedures

Leachline trench excavated.

See also: Construction Inspection Procedures, Cross Section of Leachline

Drain rock on site

3/4" to 2 1/2" clean drain rock - Drain Rock Requirements

Leachline trench ready to backfill - Untreated building paper (such as Red Rosin paper)
or other approved barrier is used over the leachline rock

Connection to septic tank - Construction Inspection Procedures

Chambers set level and soil backfilled by hand on the sides

Open seepage pit - Perforated pipe is placed in the center of the opening and drain rock is installed to the effective depth.

See also: Cross Section of Seepage Pit, Construction Inspection Procedures, Disposal Field Setbacks from Slopes and Fill Material

3/4" to 2 1/2" clean drain rock - Drain Rock Requirements

Tar paper is used to cover the rock

Pit ready to backfill

Pressurized distribution bed being installed

Pump test being conducted. The manifold system pipes are temporarily turned upwards to check pressure in the system.

Completed mound with newly planted Juniper Shrub Pfitzer around the perimeter and Rye grass covering the mound.

3/4" to 2 1/2" clean drain rock - Drain Rock Requirements.

Hardwired audio-visual alarm box on far left

In the basal system, the base of the excavation will be utilized for final disposal of the sewage effluent after it has been treated by the filter sand. Basal Suburface Filter Bed

Checking bottom level

Sand, distribution bed, monitoring ports, distribution box, and piping installed.
Ready for untreated building paper (or other approved barrier) over the bed and then backfill.

3/4" to 2 1/2" clean drain rock - Drain Rock Requirements

In this system the seepage pits are used for final disposal of the sewage effluent after it has been treated by the filter sand. Seepage pit drilled into bedrock.

See also: Disposal Field Setbacks from Slopes and Fill Material, Subsurface Filter Bed with Disposal Pit

Pipe placed to bottom of pit.

Rock installed into pit.

3/4" to 2 1/2" clean drain rock - Drain Rock Requirements

Collection bed being installed. Drain rock will be installed over the piping. The collection bed is connected to three seepage pits in the bottom of the bed in this example. The pits can also be located outside of the bed. The filter sand and then the distribution bed are placed over the collection system.