Installation Tips

Each interceptor comes with a yellow parts bag inside the product containing additional connections and installation guide document. Remove this bag before use.

Cap all unused interceptor connections with the 4" cleanout plugs provided. Use pipe thread sealant or tape approved for use with plastic. Remove covers and fill the interceptor with water to above the highest connection. Inspect the interceptor body, connections and gaskets for leaks. Check the water level inside the interceptor at specific intervals per code.

The base layer and backfill must be clean, crushed stone approximately 1” in size (AASHTO M43 Size #57 or similar) free of debris and fines. Native soil and sand are not approved backfill materials.

If the interceptor is at risk of being exposed to groundwater, an anti-flotation kit is required. If the interceptor is at risk of being exposed to groundwater levels reaching higher than the top of the tank body, it must either be encased in concrete or installed inside a watertight concrete vault for protection. Please contact Schier for the concrete encasement guidelines. The watertight concrete vault should be designed by a structural engineer.

Do not air test the interceptor or riser system. Doing so may result in property damage, personal injury or death.

Concrete pad to be reinforced with rebar and must have a minimum thickness of 4" for greenspace or pedestrian pavement, and 8" for traffic applications.

• Pad dimensions must extend 18" beyond the silhouette of the interceptor

• Concrete should have 28 day compressive strength of 4,000 PSI

• Use No. 4 rebar (Ø ½") grade 60 steel per ASTM A615: connected with tie wire

• Rebar to be 2-½" from the edge of the concrete and spaced in a 12" grid with 4" spacing around access openings.