Septic Tanks & Systems

Superior Concrete manufactures Maine's most trusted precast concrete septic systems — precast concrete septic tanks, lift stations, pump tanks, and leaching products. Whether you're specifying a residential system or a commercial installation, our precast concrete products are watertight, durable, and engineered to last decades longer than plastic or polymer alternatives. Browse our septic system categories below.

Showing 1-25 of 41 items

Showing 1-25 of 41 item(s)

Active filters

  • Use: Residential
  • Use: Shallow Bury
  • Class: H-10
  • Class: H-20
  • Class: Pedestrian

Active filters

  • Use: Residential
  • Use: Shallow Bury
  • Class: H-10
  • Class: H-20
  • Class: Pedestrian
1000 Lowboy | Superior Concrete

1000 Lowboy

  • Category:Lowboy Tanks
  • Use:Residential, Shallow Bury
  • Class:H-10, Old Style
  • Type:Concrete, Septic Tank
  • Size:1000 gallon
  • Weight:12,025 lbs
  • Capacity:1,000 gallons
  • Exterior Dimensions:49” H x 6 ’4” W x 10’ 5” L
  • Invert Out:34"
Datasheets
1000 Gallon Lowboy (LB)
1000 Lowboy H-20 | Superior Concrete

1000 Lowboy H-20

  • Category:Lowboy Tanks
  • Use:Commercial, Residential, Shallow Bury
  • Class:H-20
  • Type:Concrete, Septic Tank
  • Size:1000 gallon
  • Weight:21,300 lbs
  • Capacity:1,000 gallons
  • Exterior Dimensions:49" H x 6'-10" W x 12'-10" L
  • Invert Out:29 1/2"
Datasheets
1000 Gallon LB H-20
1000 Regular | Superior Concrete

1000 Regular

  • Category:Regular Tanks
  • Use:Residential
  • Class:H-10, Old Style
  • Type:Concrete, Septic Tank
  • Size:1000 gallon
  • Weight:9,590 lbs
  • Capacity:1,000 gallons
  • Exterior Dimensions:64" H x 5'-4" W x 8'-0" L
  • Invert Out:51 1/2"
Datasheets
1000 Reg Septic Tank
1000 Regular H-20 | Superior Concrete

1000 Regular H-20

  • Category:Regular Tanks
  • Use:Commercial, Residential
  • Class:H-20
  • Type:Septic Tank
  • Size:1000 gallon
  • Weight:10,757 lbs
  • Capacity:1,000 gallons
  • Exterior Dimensions:67" H x 5'4" W x 8'0" L
  • Invert Out:51 1/2"
Datasheets
1000 Regular H-20
12 Outlet D-Box | Superior Concrete

12 Outlet D-Box

  • Category:D-Boxes
  • Use:Commercial, Residential
  • Class:Pedestrian
  • Type:Concrete
  • Weight:Base: 1,165# / Cover: 770#
  • Interior Dimensions:86"L x 29.75"W x 16"H
  • Exterior Dimensions:90"L x 33.75"W x 21"H
  • Invert Out:~5.5"
  • Invert In:~6.5"
Datasheets
12 Outlet D-Box
1500 H-20 (38Y Style) | Superior Concrete

1500 H-20 (38Y Style)

  • Category:Regular Tanks
  • Use:Commercial, Residential
  • Class:H-20
  • Type:Septic Tank
  • Size:1500 gallon
  • Weight:23,750 lbs
  • Capacity:1,500 gallons
  • Interior Dimensions:46" H x 6'-0" W x 12'-0" L
  • Exterior Dimensions:61.5" H x 6'-10" W x 12'-10" L
  • Invert Out:42"
Datasheets
1500 38Y
1500 Regular | Superior Concrete

1500 Regular

  • Category:Regular Tanks
  • Use:Residential
  • Class:H-10, Old Style
  • Type:Septic Tank
  • Size:1500 gallon
  • Weight:13,782 lbs
  • Capacity:1,500 gallons
  • Exterior Dimensions:64" H x 6'4" W x 10'6" L
  • Invert Out:50"
Datasheets
1500 Regular
2000 H-20 (38Y Style) | Superior Concrete

2000 H-20 (38Y Style)

  • Category:Regular Tanks
  • Use:Commercial, Residential
  • Class:H-20
  • Type:Septic Tank
  • Size:2000 gallon
  • Weight:25,025
  • Capacity:2,000 gallons
  • Interior Dimensions:52.5" H x 6'-0" W x 12'-0" L
  • Exterior Dimensions:68" H x 6'-10" W x 12'-10" L
Datasheets
2000 Gal H-20 (38Y) Septic Tank
2000 Regular | Superior Concrete

2000 Regular

  • Category:Regular Tanks
  • Use:Commercial, Residential
  • Class:H-10, Old Style
  • Type:Septic Tank
  • Size:2000 gallon
  • Weight:16,552 lbs
  • Capacity:2,000 gallons
  • Exterior Dimensions:74" H x 6'4" W x 10'6" L
  • Invert Out:60"
Datasheets
2000gal Regular Septic Tank
3 Outlet Bottom-Feed D-Box | Superior Concrete

3 Outlet Bottom-Feed D-Box

  • Category:D-Boxes
  • Use:Commercial, Residential
  • Class:Pedestrian
  • Type:Concrete
  • Weight:Base: 145# / Cover: 55#
  • Interior Dimensions:12"L x 12"W x 8.75"H
  • Exterior Dimensions:20.25"L x 20.25"W x 13.25"H
  • Invert Out:5.5"
  • Invert In:3.5"
Datasheets
3-Outlet Bottom Feed D-Box
3 Outlet D-Box | Superior Concrete

3 Outlet D-Box

  • Category:D-Boxes
  • Use:Commercial, Residential
  • Class:Pedestrian
  • Type:Concrete
  • Weight:Base: 55# / Lid: 22#
  • Interior Dimensions:8"L x 8"W x 10"H
  • Exterior Dimensions:11.5"L x 11.5"W x 13.5"H
  • Invert Out:3"
  • Invert In:4"
Datasheets
3 Outlet D-Box
3' Manhole Pump Tank | Superior Concrete

3' Manhole Pump Tank

  • Category:Pump Tanks
  • Use:Commercial, Residential
  • Class:H-20
  • Type:Lift Station
  • Size:3' Dia.
  • Weight:2,625 lbs
  • Capacity:155 gal/98 gal (HWA)
  • Interior Dimensions:3' Dia x 3'0" H
  • Exterior Dimensions:3'8" Dia x 3'10" H
  • Invert Out:25" CL
  • Invert In:29.5"
Datasheets
3ft MH Pump Tank
3'x3' Pump Tank (New Style) | Superior Concrete

3'x3' Pump Tank (New Style)

  • Category:Pump Tanks
  • Use:Residential
  • Class:Pedestrian, New Style
  • Type:Lift Station
  • Size:3' Dia.
  • Weight:2,170 lbs
  • Capacity:155 gal/98 gal (HWA)
  • Interior Dimensions:3' Dia x 2'11" H
  • Exterior Dimensions:3'5" Dia x 3'7" H
  • Invert Out:22" CL
  • Invert In:26.25"
Datasheets
4x8 End Feed Flow Diffusers | Superior Concrete

4x8 End Feed Flow Diffusers

  • Category:Flow Diffusers
  • Use:Commercial, Residential
  • Class:H-10
  • Type:Concrete
  • Weight:2,225 lbs
  • Capacity:140 gal
  • Interior Dimensions:3'-4 3/4" x 7'-4 3/4" x 9"
  • Exterior Dimensions:4' x 8 x 1'-1"
  • Invert Out:6.5"
  • Invert In:6.5"
Datasheets
4x8 Endfeed Chamber
4x8 Side Feed Flow Diffusers | Superior Concrete

4x8 Side Feed Flow Diffusers

  • Category:Flow Diffusers
  • Use:Commercial, Residential
  • Class:H-10
  • Type:Concrete
  • Weight:2,225 lbs
  • Capacity:140 gal
  • Interior Dimensions:3'-4 3/4" x 7'-4 3/4" x 9"
  • Exterior Dimensions:4' x 8 x 1'-1"
  • Invert Out:6.5"
  • Invert In:6.5"
Datasheets
4x8 Sidefeed Chamber
5 Outlet D-Box | Superior Concrete

5 Outlet D-Box

  • Category:D-Boxes
  • Use:Residential, Sanitary
  • Class:Pedestrian
  • Type:Distribution
  • Weight:Base: 73# / Lid: 27#
  • Interior Dimensions:16.5"Lx7.5"Wx8"H
  • Exterior Dimensions:20"Lx11"Wx11"H
  • Invert Out:3"
  • Invert In:4"
Datasheets
5 Outlet D-Box
700 Ultra Lowboy | Superior Concrete

700 Ultra Lowboy

  • Category:Lowboy Tanks
  • Use:Residential, Shallow Bury
  • Class:H-10, Old Style
  • Type:Concrete, Septic Tank
  • Size:700 gallon
  • Weight:10,510 lbs
  • Capacity:700 gallons
  • Exterior Dimensions:26 1/2” H x 6 ’4” W x 10’ 6” L
  • Invert Out:29 1/2"
Datasheets
700 Gallon Ultra Lowboy
750 Lowboy | Superior Concrete

750 Lowboy

  • Category:Lowboy Tanks
  • Use:Residential, Shallow Bury
  • Class:H-10, Old Style
  • Type:Concrete, Septic Tank
  • Size:750 gallon
  • Weight:8,315 lbs
  • Capacity:750 gallons
  • Exterior Dimensions:49” H x 5 ’4” W x 8’ 0” L
  • Invert Out:36 1/2"
Datasheets
750 Gallon LB
750 Lowboy H-20 | Superior Concrete

750 Lowboy H-20

  • Category:Lowboy Tanks
  • Use:Residential, Shallow Bury
  • Class:H-20
  • Type:Concrete, Septic Tank
  • Size:750 gallon
  • Weight:8,740 lbs
  • Capacity:750 gallons
  • Exterior Dimensions:52” H x 5 ’4” W x 8’ 0” L
  • Invert Out:36 1/2"
Datasheets
750 Gallon LB H-20
8 Outlet D-Box | Superior Concrete

8 Outlet D-Box

  • Category:D-Boxes
  • Use:Commercial, Residential, Sanitary
  • Class:Pedestrian
  • Type:Concrete, Distribution
  • Weight:Base: 95# / Lid: 53#
  • Interior Dimensions:21"Lx11"Wx8"H
  • Exterior Dimensions:24"Lx14.5"Wx11"H
  • Invert Out:2.5"
  • Invert In:4"
Datasheets
8-Outlet D-Box

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