Nashville & Davidson County, TN Certified Backflow Testing & Grease Trap (FOG) Directory (2026 Rules & Prices)

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Nashville & Davidson County Consumer & Compliance Alert (Verified 2026-10-29)

NASHVILLE TIP: Metro Water customers don't hire a tester for the annual test. MWS or its contractor, American Backflow Inspectors, tests every device and puts the $50 charge on your water bill. If a company offers to do your annual MWS test, check with MWS first (615-862-4872). You do need a plumber if your device fails. Ask for a rebuild-vs-replace quote, and have the repair done before the re-test date on your test form ($42 per re-test).

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POTABLE WATER & IRRIGATION / FIRE

Metro Water Services (MWS) — Cross Connection Control Program Rules

Official Program	MWS Cross Connection Control Plan (Metro Code 15.12.070) ↗
Filing Portal & Fee	No customer filing: MWS or its contractor, American Backflow Inspectors (ABI), tests every device and bills $50 on your water bill $50 per device per annual inspection during normal business hours (billed on your MWS water bill); $42 per re-test after a failure; extra charges for after-hours inspections. Prices subject to change.
Tester Registry	View Official Municipal Tester List ↗
Annual Deadline Rule	To meet state requirements, every backflow device on the Metro Water system must be inspected every year by Metro Water Services or its contractor. MWS schedules the inspections by geographic area, so customers don't book their own annual test. High-hazard commercial sites such as restaurants, medical facilities, automotive businesses, multi-story buildings and apartment complexes are tested every 12 months. Homes with a cross connection (pools, hot tubs, underground irrigation, fire sprinklers or an alternate water source) are also tested every 12 months. Buildings with three or more units count as commercial. New installations must pass an initial inspection (requested by the plumber through mws.ds@nashville.gov) before they are set up for annual inspections. Customers of other Davidson County water utilities, such as Madison Suburban Utility District, follow their own utility's backflow rules.
Non-Compliance Penalty	If an assembly fails, MWS sets a deadline to fix it that ranges from immediate disconnection to 90 days, depending on the hazard. Each re-test costs $42. Under Metro Code 15.12.070, after reasonable efforts to notify the owner, MWS physically disconnects water service to any property with an unapproved cross connection, and service is restored only once the cross connection is removed or an approved, working backflow device is installed. ABI's published procedure notifies the water district after a third failed test, which results in water service being discontinued.
Utility Contact	615-862-4872 / mwscrossconnection@nashville.gov (MWS Cross Connection) • Metro Water Services Customer Service Building, 1700 3rd Ave N, Nashville, TN 37208

RESTAURANT & COMMERCIAL KITCHEN FOG

Metro Water Services — Environmental Compliance Fats, Oils & Grease (FOG) Program Rules

Official Program	MWS Fats, Oils & Grease Management Policy No. 2004-01, Rev. 3 (effective Oct. 1, 2024) & Sewer Use Ordinance ↗
Mandatory Pumping Schedule	Grease interceptors must have the full contents of both chambers pumped at least every 90 days unless MWS approves otherwise. Interceptors with an operational digital monitoring device or alarm may be approved for a longer interval, but never longer than 180 days. Pump immediately once floating FOG and settled solids together reach 25% of the liquid depth (the "25 Percent Rule"). Grease traps (under 500 gallons) must be fully cleaned at least every 30 days, or every two weeks if FOG and solids are over 25%. Partial pumping and on-site pump-and-treat are not allowed. Every grease interceptor or trap must also pass an annual certification (Form A or Form B) by an MWS-certified inspector (an approved hauler or plumber), submitted to mws.sdc@nashville.gov.
Manifest & Hauler Rule	Use only an MWS Approved Grease Waste Hauler, meaning a company with the required permits and bonds that has signed the MWS Grease Waste Hauler Agreement. The hauler must pump the entire contents (FOG, food solids and water) and give you a manifest showing the date and time, gallons pumped, and your establishment's name and address. It must report any defects in writing and file a monthly pump report with MWS. Keep cleaning and maintenance records on site, in paper or digital form, for at least 3 years and show them on request. Repair missing components or defects within 30 days.
Violation Fines	Violations are enforced under the MWS Sewer Use Ordinance and the FSE Enforcement Response Guide. The food service establishment may have to reimburse MWS for labor, equipment, supplies and disposal costs, which can be added to its water and sewer bill. Failure to reimburse can lead to water service termination. Penalties can be appealed to the Waste Water Hearing Authority.
Environmental Desk	615-862-4600 (Metro Water Services) / mws.sdc@nashville.gov (annual grease certifications)
Governing Code	Metro Code 15.12.070 (Ordinance BL2005-844), MWS Cross Connection Control Plan & Tennessee public water system rules (TDEC Division of Water Supply)

AUTOMATED DEADLINE & MULTI-SITE PORTFOLIO CONCIERGE

Never Miss a Nashville & Davidson County Water District Deadline — $49/Year Compliance Alert Concierge

Avoid Metro Water Services (MWS) — Cross Connection Control Program late fees (If an assembly fails, MWS sets a deadline to fix it that ranges from immediate disconnection to 90 days, depending on the hazard. Each re-test costs $42. Under Metro Code 15.12.070, after reasonable efforts to notify the owner, MWS physically disconnects water service to any property with an unapproved cross connection, and service is restored only once the cross connection is removed or an approved, working backflow device is installed. ABI's published procedure notifies the water district after a third failed test, which results in water service being discontinued.) and Metro Water Services — Environmental Compliance Fats, Oils & Grease (FOG) Program FOG citations. We track your assembly serial numbers, No customer filing: MWS or its contractor, American Backflow Inspectors portal cutoff dates, and 90-day grease trap pumping schedules across one or multiple properties.

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Annual Property Protection Pass

$49 / year (up to 5 sites)

Prevents $250–$1,000+ utility late penalties & shutoffs

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Verified Certified Testers & Permitted FOG Haulers in Nashville & Davidson County

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American Backflow Inspectors (ABI)

Backflow Testing✓ Takes Residential Jobs✓ Direct Portal Filing (No customer filing: MWS or its contractor, American Backflow Inspectors)

Nashville company that only inspects backflow devices, holding Metro's backflow testing contract. Failed devices get a re-test about 30 days later and a second follow-up about 14 days after that. ABI doesn't do repairs, to avoid a conflict of interest.

Credentials: Awarded Metro Nashville Cross Connection Backflow Testing & Inspection Services contract (RFQ 341266, 2023) • Tennessee-certified backflow testers on staff Area / Address: 2572 Murfreesboro Pike, Nashville, TN 37217 Source: Official Website (abibackflow.com) & Metro Nashville Notice of Intent to Award, RFQ 341266 ↗

Annual Metro Water test billed by MWS at $50 per device ($42 per re-test); inspection-only, no repairs

Call (615) 366-8983

Holt Plumbing Company

Backflow Testing✓ Takes Residential Jobs⚡ 24/7 Emergency✓ Direct Portal Filing (No customer filing: MWS or its contractor, American Backflow Inspectors)

Family-owned Nashville plumber since 1988 that installs, repairs and tests backflow devices. Holt says it works with Metro Water and ABI to schedule same-day re-testing after a repair.

Credentials: On Consolidated Utility District certified backflow testers list • On Metro Water Services approved grease control equipment (GCE) certification plumber list Area / Address: 2608 Murfreesboro Pike, Nashville, TN 37217 Source: Official Website (holtplumbing.com), CUD Certified Testers List & MWS Approved Hauler/Plumber list ↗

Backflow installation, repair and annual testing; call for a quote

Call (615) 361-6001

Wehby Plumbing Company

Backflow Testing✓ Takes Residential Jobs✓ Direct Portal Filing (No customer filing: MWS or its contractor, American Backflow Inspectors)

Nashville plumbing company since 1959 that installs and repairs backflow devices. It's an approved backflow tester for water utilities around Davidson County that require customers to arrange their own annual test.

Credentials: Certified for installation & repair of domestic backflow systems • On Metro Water Services approved GCE certification plumber list Area / Address: 2703 Grandview Ave, Nashville, TN 37211 Source: Official Website (wehbyplumbing.com) & MWS Approved Hauler/Plumber list ↗

Free estimates (call or request online) for backflow installation and repair

Call 615-255-7424

Mac Septic

Grease Trap / FOG Hauling

Commercial grease trap and interceptor pumping with published flat prices. Its subscriptions include 5 pump-outs a year, monthly inspections and the annual certification.

Credentials: On Metro Water Services approved GCE certification hauler list (MAC Septic, LLC) • Nearly 30 years in commercial waste service Area / Address: Greater Nashville, TN (serving south Davidson, Williamson, Rutherford & Maury counties) Source: Official Website (macseptic.com) & MWS Approved Hauler/Plumber list ↗

Published one-time pump-outs: $200 (small interior) to $1,400 (2,000 gal), dump fees included; subscriptions from $100/mo

Call (615) 345-2544

Music City Environmental (formerly Music City Processing)

Grease Trap / FOG Hauling

Family-owned Nashville company on Elm Hill Pike, founded in 2010, that handles grease trap pumping, used cooking oil collection and oil/water separator service.

Credentials: On Metro Water Services Approved Grease Waste Hauler List (as Music City Processing) • Family-owned since 2010 Area / Address: 1629 Elm Hill Pike, Nashville, TN 37210 Source: Official Website (musiccityenvironmental.com) & MWS Approved Grease Waste Hauler List ↗

Grease trap maintenance programs plus used cooking oil collection; contact for pricing

Call 615-399-8400

Elitte Septic Tank & Grease Trap Service

Grease Trap / FOG Hauling✓ Takes Residential Jobs

Owner-led septic and grease trap company (owner Robert Foster has 24+ years of experience) serving Nashville and Middle Tennessee. Also offers jetter service, line locating and septic tank repairs. An after-hours receptionist books emergency service.

Credentials: On Metro Water Services Approved Grease Waste Hauler List • 24+ years in waste removal Area / Address: Serving Nashville & Middle Tennessee Source: Official Website (elitteseptictank.com) & MWS Approved Grease Waste Hauler List ↗

Jobs scheduled Mon–Fri in 8am–12pm or 12–4pm windows; $155 service charge if a job can't be completed

Call 615-504-7178

CODE-APPROVED COMPLIANCE HARDWARE & REBUILD KITS

Nashville & Davidson County, TN Required Replacement Parts, Freeze Protection & Under-Sink Grease Traps

Failed an annual inspection or preparing for winter freeze warnings? Order code-approved ASSE backflow rebuild kits, insulated enclosures, and PDI-certified commercial grease traps before your re-test.

ASSE 1060 CLASS II / III FREEZE PROTECTION

Insulated Backflow Preventer Freeze Protection Blanket / Heated Pouch (ASSE 1060 Class II/III)

Prevents $400–$900 winter freeze bursts on exterior PVB & RPZ irrigation and commercial assemblies with heavy-duty weatherproof insulation and locking grommets.

Fits 3/4" to 2" PVB, RPZ & DCVA valves • UV & waterproof outer shell

Typical Price Range

$38–$89

Shop Freeze Blankets & Heated Pouches ↗

OEM & ASSE RUBBER REBUILD KITS

Watts 009 / 909 & Zurn Wilkins 975XL / 375 Rubber Rebuild & Repair Kits

Complete first/second check & differential relief valve rubber repair kits (O-rings, discs, springs, and diaphragm) to pass a failed annual test without replacing the entire brass body.

Compatible with 3/4"–2" Watts 009/LF009 & Wilkins 975XL/975XL2/375

Typical Price Range

$35–$115

Shop Check & Relief Valve Rebuild Kits ↗

LEAD-FREE HIGH-HAZARD RPZ ASSEMBLY

Zurn Wilkins 975XL2 / Watts LF009 Lead-Free Reduced Pressure Zone (RPZ) Assembly (3/4" – 2")

Code-required high-hazard commercial, restaurant, medical, and irrigation replacement assembly with quarter-turn ball valves and top-access check seats.

USC FCCCHR & ASSE 1013 Approved • Lead-Free Cast Bronze

Typical Price Range

$245–$680

Compare Approved RPZ Assemblies ↗

PDI-G101 COMMERCIAL FOG INTERCEPTOR

Commercial Under-Sink Hydromechanical Grease Trap (20–50 lb / 10–25 GPM PDI-Certified Steel/Poly)

Code-compliant indoor hydromechanical grease interceptor (HGI) for cafes, delis, coffee shops, and small commercial kitchens with flow-control fitting and removable baffles.

20 lb–50 lb capacity (10–25 GPM) • Meets 25% FOG rule & IPC/UPC code

Typical Price Range

$165–$420

Shop PDI-Certified Grease Traps ↗

LOCAL FAIR-PRICE BENCHMARK CALCULATOR

Nashville & Davidson County, TN Backflow & Grease Trap Cost Estimator

Check what your job should actually cost in Nashville & Davidson County before accepting an inflated quote—and compare against municipal non-compliance penalties.

Select Compliance Job Type

Number of Assemblies / Traps

Scheduling Window

Nashville & Davidson County Fair-Price Benchmark

$50

Metro Water Services annual inspection: $50 per device during business hours, billed on the water bill (MWS Cross Connections Program page).

Overpriced Quote Alert: Metro Water's own annual test is $50 per device on your water bill, so MWS customers shouldn't pay a private company for the annual test. Repairs and rebuilds are separate. Get a written quote, and get a second opinion if one assembly repair runs well over a few hundred dollars. Non-compliance enforcement risk: MWS fixes range from immediate disconnection to 90 days, with a $42 charge per re-test; water service is disconnected for unapproved cross connections.

Price sources (checked Oct 2026):

Metro Water Services Cross Connections Program (nashville.gov): $50 per device annual inspection; $42 per re-test
Mac Septic Nashville grease trap pricing (macseptic.com): one-time $200 (small interior) / $350 (500 gal) / $700 (1,000 gal) / $1,050 (1,500 gal) / $1,400 (2,000 gal), dump fees included
Pump Co. subscriptions (pumpcotn.com): grease trap from $315/mo (varies by size); 1,000-gallon interceptor $900

Backflow figures are Metro Water's own published inspection fees, not private-tester prices. Grease figures are published prices from Nashville-area haulers.

Nashville & Davidson County, TN Backflow & Grease Trap FAQs

Direct answers sourced from Metro Water Services (MWS) — Cross Connection Control Program and Metro Water Services — Environmental Compliance Fats, Oils & Grease (FOG) Program regulations.

Do I have to hire a backflow tester in Nashville?

Not if you're a Metro Water Services customer. MWS or its contractor, American Backflow Inspectors, tests every backflow device every year, schedules the tests by area, and adds $50 per device to your water bill. You'll only need a plumber if the device fails or needs installing. Questions: 615-862-4872 or mwscrossconnection@nashville.gov.

What happens if my backflow device fails the Metro Water test?

MWS gives you a deadline to fix it, from immediate disconnection to 90 days depending on the hazard level. Re-tests continue until the problem is fixed and cost $42 each. Have a plumber repair or rebuild the device before the re-test date. ABI's procedure notifies the water district after a third failed test, which results in water service being discontinued.

How often must Nashville restaurants pump grease interceptors?

Under the MWS FOG Policy, interceptors must be fully pumped at least every 90 days (or once FOG and solids reach 25%), and grease traps cleaned at least every 30 days. Use an MWS Approved Grease Waste Hauler, keep manifests for 3 years, and submit an annual Form A/Form B certification to mws.sdc@nashville.gov.

FREE · NO CREDIT CARD

Free Backflow Test & Grease Trap Due-Date Reminder in Nashville & Davidson County

Tell us when your last backflow test or grease trap pump-out was and we’ll remind you before the next one is due — so you don’t get hit with a late notice, fine, or water shutoff.

Business name *

Email *

Phone (optional)

City *

Service type *

Last test / pump date (optional)

Number of sites *

For providers: buy exclusive reminder leads in your city ($149/mo bundle).

Nashville & Davidson County, TN Certified Backflow Testing & Grease Trap (FOG) Directory

Nashville & Davidson County Consumer & Compliance Alert (Verified 2026-10-29)

Free Backflow Test & Grease Trap Due-Date Reminder in Nashville & Davidson County

✓ You’re on the free reminder list.

Metro Water Services (MWS) — Cross Connection Control Program Rules

Metro Water Services — Environmental Compliance Fats, Oils & Grease (FOG) Program Rules

Never Miss a Nashville & Davidson County Water District Deadline — $49/Year Compliance Alert Concierge

Verified Certified Testers & Permitted FOG Haulers in Nashville & Davidson County

American Backflow Inspectors (ABI)

Holt Plumbing Company

Wehby Plumbing Company

Mac Septic

Music City Environmental (formerly Music City Processing)

Elitte Septic Tank & Grease Trap Service

Nashville & Davidson County, TN Required Replacement Parts, Freeze Protection & Under-Sink Grease Traps

Insulated Backflow Preventer Freeze Protection Blanket / Heated Pouch (ASSE 1060 Class II/III)

Watts 009 / 909 & Zurn Wilkins 975XL / 375 Rubber Rebuild & Repair Kits

Zurn Wilkins 975XL2 / Watts LF009 Lead-Free Reduced Pressure Zone (RPZ) Assembly (3/4" – 2")

Commercial Under-Sink Hydromechanical Grease Trap (20–50 lb / 10–25 GPM PDI-Certified Steel/Poly)

Nashville & Davidson County, TN Backflow & Grease Trap Cost Estimator

Are You a Certified Backflow Tester or Permitted FOG Hauler?

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Nashville & Davidson County, TN Backflow & Grease Trap FAQs

Do I have to hire a backflow tester in Nashville?

What happens if my backflow device fails the Metro Water test?

How often must Nashville restaurants pump grease interceptors?

Free Backflow Test & Grease Trap Due-Date Reminder in Nashville & Davidson County

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