Prinsco Septic Chambers. Reliable Gravelless Drainfield Systems.
Prinsco’s trusted line of Pro4® septic chambers. A complete range of gravel-free, high-performance drainfield solutions engineered for both residential and commercial septic systems.
Why Choose Prinsco Pro4®
- Gravelless Convenience: Pro4® chambers eliminate the need for traditional rock and gravel drainfields. The result: faster installs, less labor, and reliable effluent distribution.
- Proven Structural Strength: Unique asymmetrical-arch construction supports heavy loads (up to 16,000 lbs/axle with 12" of cover), delivering long-term performance under soil and traffic pressure.
- Easy, Flexible Installation: Lightweight HDPE design, interlocking couplers with up to 10° joint articulation, and support for multiple inlet configurations (front, side, or top) make installation faster and more adaptable to varying terrain or trench layouts.
- Versatile for Systems Big and Small: Pro4® chambers accommodate gravity-fed or pressure-dosed systems, and fit 1-1/4"-2" drain piping installed at grade or suspended, making them compatible with a wide variety of septic tank setups.
- Certified & Code-Ready: Pro4® is certified to meet IAPMO standards and accepted in many jurisdictions as a compliant alternative to traditional gravel drainfields.
System Compatibility
Prinsco septic chambers are designed to work with standard 4" outlet septic tanks, as long as the tank outlet and drainfield piping comply with local code and installation requirements. Prinsco septic chambers are a universal solution.
Prinsco Pro4® septic chambers are gravelless and lightweight, making them especially useful when:
- Gravel supply or delivery is difficult or costly
- Terrain is difficult or trenches require contours or bends
- You want a faster, more efficient install with less onsite labor
Pro4® Chamber Models
| Model |
Trench Width |
Sidewall Height |
Use |
| Pro4® 36 |
36" |
12" |
Standard gravity or pressure-dosed systems for most residential builds |
| Pro4® 36HC |
36" |
16" |
Larger or high-flow systems. Great for bigger homes or heavier wastewater loads |
| Pro4® 36LP |
36" |
8" |
Low-cover installations or sites with limited embedment depth |
| Pro4® 24 |
24" |
12" |
Smaller lots or tighter trenches where a narrow footprint is needed |
National Tank Outlet is ready to help fulfill your liquid storage needs. Contact our team for help sizing the right system for your septic tank and site.
