615 Septic Tank Pumping

Septic Tank Cleaning in Nashville, TN

A step beyond pumping: the tank is emptied, then the walls, baffles and floor are washed down and the hardened scum mat and compacted sludge are broken up and removed.

Call (615) 234-9048 Estimate the cost

from $450

$400–$650 depending on tank size and how compacted the sludge layer is

Septic Tank Cleaning in Nashville, TN
  • Tenn. Comp. R. & Regs. 0400-48-01-.20 governs septic pumping contractors
  • Davidson County administers its own septic program as a TDEC contract county
  • Tennessee guidance: pump every 3–5 years
  • Grease traps serviced every 30 days · interceptors every 90
  • Sludge and scum depth recorded on every visit

Last updated: August 31, 2026

615 Septic Tank Pumping is a septic tank pumping company serving Nashville and Davidson County, Tennessee, and septic tank cleaning is one of the services it provides across the county. A step beyond pumping: the tank is emptied, then the walls, baffles and floor are washed down and the hardened scum mat and compacted sludge are broken up and removed.

When people call us about this

These are the situations that bring most septic tank cleaning calls in:

  • Tank pumped recently but drains still slow
  • A hardened scum mat that a pump hose cannot break through
  • Sludge compacted at the tank floor after years of missed intervals
  • Buying a property with no service records at all
  • Odour persisting after a routine pump-out

What is included

Every septic tank cleaning job includes all of the following. Nothing on this list is an upsell presented once we are on site.

  • Everything in a full pump-out — liquid, scum and sludge
  • Mechanical break-up of a hardened scum mat the hose cannot lift
  • Removal of compacted sludge from the tank floor and corners
  • Wash-down of interior tank walls to expose the concrete for inspection
  • Inlet and outlet baffle cleared and inspected with the walls visible
  • Effluent filter removed, cleaned and refitted, or flagged for replacement
  • Inspection for cracks, spalling and root intrusion once walls are clean
  • Written condition report with photographs of anything that needs attention

What it costs, and what moves the price

Cleaning costs more than routine pumping because it is a longer job on site. Davidson County septic cleaning figures reported by homeowners span $199–$796, with cleaning at the upper end of that band.

The published range for this service is $400–$650 depending on tank size and how compacted the sludge layer is. We give you a band before we come out and a firm number before we do anything that changes it. If you want a figure right now without talking to anyone, the cost estimator takes three questions.

How septic tank cleaning runs, start to finish

  1. 01

    Establish what is in there

    Cleaning is the right call when sludge has compacted or a scum mat has hardened. We measure first — if a routine pump-out is genuinely all you need, we say so and charge for that instead.

  2. 02

    Pump down

    The tank is emptied of liquid, scum and sludge exactly as in a standard pump-out, which is the prerequisite for everything that follows.

  3. 03

    Break up and wash down

    Compacted material is broken up and drawn off, then the walls and floor are washed down so the concrete, baffles and filter are visible rather than coated.

  4. 04

    Inspect the clean tank

    A clean tank is the only time you can genuinely assess it. Cracks, spalling, failed baffles and root intrusion all get found here, photographed and reported.

Doing it yourself, hiring cheap, and doing it properly

The difference between a cheap pump-out and a proper one is not the truck. It is whether anybody looked inside the tank while it was empty.

  Doing it yourself Cheapest quote Done properly
Solids actually removed Surface liquid only — no way to remove settled sludge Liquid draw-down; tank looks emptied, sludge stays Liquid, scum and sludge pumped, then backflushed
Baffles inspected Not visible without emptying the tank Rarely — the tank is not pumped down far enough to see them Both baffles inspected while the tank is empty, and reported
Effluent filter Usually not known to exist Left alone Removed, rinsed back into the tank, inspected, replaced if split
Interval set by Guesswork or a number off the internet A flat three years for every customer Measured sludge and scum depth against your tank capacity
Disposal of septage No lawful route for a homeowner Varies — ask where it goes Licensed disposal under Tennessee pumping contractor rules
What it costs Nothing up front Slightly less than proper $300–$525 typical
What it risks Solids reach the drain field. Field replacement $7,000–$15,000+ Same failure, delayed. The field pays for the saving The field is what you are protecting

Worth reading before you book

Decision Guide

What is the difference between septic pumping and cleaning?

Two words used interchangeably by most companies, describing two genuinely different jobs.

What To Do Now

What are the signs a septic tank is full?

Systems signal for months before they fail. Here is the sequence, and where in it you currently are.

Decision Guide

What happens if you never pump your septic tank?

The tank keeps working long after the damage starts. That is exactly why this failure is so expensive.

Need septic tank cleaning in Nashville?

Call for a price, or use the estimator if you would rather not talk to anyone yet.

Call (615) 234-9048 Get a price

Septic Tank Cleaning — questions people ask

What is the difference between septic tank pumping and cleaning?

Pumping removes what the hose can draw out — liquid, floating scum and settled sludge. Cleaning adds mechanical break-up of hardened material and a wash-down of the tank interior so the walls and baffles can actually be inspected. Most households need pumping on a cycle and cleaning occasionally, typically every second or third visit.

Does my tank need cleaning or just pumping?

If you have pumped on schedule and have service records, pumping is almost certainly enough. Cleaning earns its cost when intervals have been missed for years, when a scum mat has hardened, or when you have bought a property with no records and want the tank assessed properly rather than guessed at.

Will cleaning fix slow drains on its own?

Sometimes — if the cause was a tank so full that solids were carrying to the outlet. If the drain field itself has been damaged by years of solids reaching it, cleaning the tank stops further harm but does not restore the field. We tell you which of the two you are looking at.

Do I need to add bacteria or a starter after cleaning?

No. A septic tank is repopulated by normal household wastewater within days. Additive products sold for this purpose are not required by Tennessee rules and are not part of our service.

How do you price the work, and will the price change once you are here?

You get a range before we come out, based on your tank size and how buried the lids are. Tennessee pumping runs $275–$525 and Davidson County figures span $199–$796, so the honest answer is that access and capacity move it. If we open the tank and find something that changes the job — compacted sludge needing a clean, a corroded baffle, a split effluent filter — we tell you what it costs and let you decide before we do it. We do not do the work and present the bill afterwards.

Related services

Residential Septic Tank Pumping

Scheduled pumping for Davidson County homes, with the tank opened, both baffles checked and the sludge and scum depths recorded before we leave.

Septic Tank Inspection

A documented assessment of tank, baffles, filter and field condition — for owners who want to know where they stand rather than wait for a symptom.

Septic Baffle Repair

Corroded and displaced baffles send solids straight to the drain field for years before anything shows up at the house. This is the repair that prevents the expensive one.

Call (615) 234-9048 — a person answers