LPP Septic System Installation in Middle Tennessee
The engineered solution when your site fails conventional perc — clay soils, shallow bedrock, and high water tables. Currently serving Maury County and Rutherford County.
A Low Pressure Pipe (LPP) septic system is the TDEC-approved engineered solution when a conventional gravity system isn't feasible. Instead of relying on passive gravity drainage, an LPP system uses a pump to dose effluent in small, timed intervals through small-diameter pressure distribution pipes across a shallow, wide drain field.
This pressure-dosed approach distributes effluent evenly across a larger soil contact area, preventing localized overloading and extending drain field life — critical on the clay-heavy soils common across Maury and Rutherford counties. If your property didn't pass perc testing for a conventional system, an LPP system is almost certainly your path forward. Back 40 currently installs LPP systems in Maury County and Rutherford County.
When Is an LPP System Required?
- Soil fails conventional perc test due to clay content or slow drainage
- Shallow depth to bedrock (common in Highland Rim limestone terrain across Middle Tennessee)
- Seasonal high water table is too close to the surface for gravity drain field separation
- Limited drain field area requiring a smaller, more efficient footprint
- Sites on slopes where gravity distribution would be uneven
Our LPP Installation Process
Soil Evaluation
A TDEC-licensed evaluator confirms the site requires LPP based on soil depth, drainage rate, and water table elevation.
Engineering Design
A licensed PE produces the system design — pump sizing, pipe layout, dose timing, and drain field dimensions.
Permit Approval
We submit the full permit package to your county environmental health office. Typical review: 2–6 weeks.
Site Prep
Clearing, grading, and access work completed before installation begins.
Installation
Septic tank, pump chamber, distribution network, and shallow drain field installed per engineered design.
Inspection & Commissioning
County inspection, pump testing, alarm verification, and final backfill.
What's Included
- Pump chamber installation with effluent pump, float switches, and alarm
- Pressure distribution network — small-diameter pipes dosed in timed intervals
- Shallow drain field installation sized per engineer specifications
- Control panel and electrical coordination
- Site clearing, grading, and access prep
- TDEC permit coordination with licensed PE design
Maintenance Requirements
LPP systems require more maintenance than conventional gravity systems, but it's straightforward: pump the septic tank every 3–5 years, and inspect the pump, floats, and alarm annually. The pump itself typically lasts 7–10 years. Budget $150–$300/year for inspections and plan for pump replacement every decade.
Cost
LPP systems in Middle Tennessee typically range from $10,000–$20,000+ installed, depending on system size, drain field area, site prep requirements, and engineering complexity. For a full cost comparison with conventional systems, see our septic system cost guide for Middle Tennessee. We provide free on-site estimates with honest numbers before any work begins.
Get a Free Estimate
We'll walk you through the LPP process, what your site requires, and real cost expectations.
(615) 609-0053✅ Veteran-Owned & Operated
✅ Licensed & Insured
✅ Full PE Engineering Coordination
✅ TDEC Permit Coordination