Lilly's Septic Tank Pumping - Maple Valley, WA - Septic Tank Cleaning & Repair

Lilly's Septic Tank Pumping

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Lilly's Septic System Service, provides quality environmentally conscious expert Septic Tank Pumping & Septic System Installation services to residential and commercial clients in King & Pierce Counties.
You can count on Lilly's Septic Service for:

* Septic Tank Cleaning and Pumping
* Septic System Installation
* Real Estate Sale Inspection
* Septic System Troubleshooting & Repairs
* Drain Field Repair & Installation
* Pump Alarm and Pump repair & Replacement
*.. Monitoring & Maintenance Service
* Emergency Service

We proudly provide the best customer service in the industry! Since 1978, Lilly's Septic Services has provided its clients with quality, expert & thorough service. Based in King County, Lilly's handles both residential and commercial jobs ranging from Septic tank cleaning and pumping, Locating and Digging Septic Tank lids, Troubleshooting & Drainfield Repair and Replacement, emergency repairs, Pump Replacements & New Septic System Installations.

Providing professional Septic Services to homeowners in Issaquah, Sammamish, Renton, New Castle, Maple Valley, Covington, Kent, Auburn, Federal Way, Enumclaw, Black Diamond, Hobart, SeaTac, Seattle Tukwilla and all So. King County Cities.

Lilly's Septic Tank Service guarantees satisfaction. Our company is a member of the National Onsite Wastewater Recycling Association (NOWRA), the Better Business Bureau (BBB) and the Washington Onsite Sewage Association (WOSSA).

Darren McCullough, Owner and Operator is a Certified Septic System O&M Inspection Professional,Certified Master Installer & Certified Septic Tank Pumping Professional in King, Pierce, Snohomish & Kittitas Counties.


Business details


  • Back Flow Prevention
  • Cesspool Cleaning
  • Commercial Services
  • Grease Trap Pumping
  • Inspection Letters & Certificates
  • Regular Maintenance
  • Septic Tank Cleaning
  • Septic Tank Pumping
  • Sewer Line Installation
  • Sewer Line Repairs
  • Soil Testing
  • System Upgrades
  • Tank Installation
  • Water Line Installation

Parts & Systems

  • Cesspools & Dry Wells
  • Drain Fields
  • Grease Traps
  • Lift Stations
  • Septic Tanks
  • Sewer Lines

Hours of Operation

  • MON
  • 9:00am
  • 4:00pm
  • TUE
  • 9:00am
  • 4:00pm
  • WED
  • 9:00am
  • 4:00pm
  • THU
  • 9:00am
  • 4:00pm
  • FRI
  • 9:00am
  • 4:00pm
  • SAT
  • SUN

Payments Accepted

  • American Express
  • Debit Card
  • Mastercard
  • Money Orders
  • Personal Checks
  • Visa

Year Established


Languages Spoken

  • English


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Photos (3 photos)

  • Lilly's Septic Tank Pumping - Maple Valley, WA - Gravity Septic system diaram
  • Lilly's Septic Tank Pumping - Maple Valley, WA - Double compartment Septic Tank used since the 1980's
  • Lilly's Septic Tank Pumping - Maple Valley, WA - Pump Tank diagram used in a pressure distribution septic system

Gravity Septic system diaram


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Gravity Septic system diaram