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The Contactor® Chamber series consists of lower profile, lower capacity chambers used for septic installations with depth restrictions or where larger units are may not approved by the local authority. The Contactor Field Drain C-4 is our lowest profile septic chamber with largest bottom area infiltrative capability.

It is available in both Standard and Heavy Duty versions.

Available models:

Standard Duty
Contactor Field Drain C-4R Standard Duty Stand Alone/Starter Unit
Contactor Field Drain C-4E Standard Duty Middle/End Unit

Heavy Duty
Contactor Field Drain C-4RHD Heavy Duty Stand Alone/Starter Unit
Contactor Field Drain C-4EHD Heavy Duty Middle/End Unit

Please note: Although CULTEC septic products may be shipped to any location, we are currently most cost-effective in the following states: CT, MA, ME, NH, NY. and VT. Call for details.
Unit of Measure


N/A 8.50 ft2.59 m

Installed Length

N/A 8.00 ft2.44 m

Length Adjustment per Run

N/A 0.50 ft0.15 m


N/A 48 in1219 mm


N/A 8.50 in216 mm

Invert Height

N/A 3 in76 mm