The #1 Plumbing Service providers
in Suffolk & Nassau Counties - Long Island
Plumbing Panic? We’re Your 24/7/365 Lifeline!
Why Choose CMMSeptic
CMMSeptic is Long Island’s trusted provider of septic system services, cesspool pumping, and emergency plumbing solutions—available 24/7. From septic tank cleaning and sewer line repair to drainage excavation, new system installs, and hydro jetting, our team delivers fast, compliant, and long-lasting results.
With nearly 20 years of experience and a fleet of tech-enabled service trucks, we serve both residential and commercial properties across Suffolk and Nassau Counties. Backed by transparent pricing, fast response, and 5-star customer reviews, we make wastewater and plumbing issues hassle-free.
24/7 Emergency Service
All-in-One Service
Upfront Estimates
Advanced Equipment
Same-Day Service
Certified Technicians
Our Customers
Reviews
4.5
over 133 reviews





Our Services

Plumbing Repairs & Services
Being a complete plumbing installation company, CMM Septic has proudly served Nassau and Suffolk Counties for the past 60+ years with reliable, full-service plumbing repairs and installations. Centrally located and equipped with advanced tools, our expert 24/7 plumbers handle everything from quick fixes to full system upgrades.

Fixture & Water Heater Installations
Installing or replacing bathroom or kitchen fixtures? Upgrading to a modern, energy-efficient water heater or repairing the current one? CMM Septic takes a meticulous approach to every plumbing installation, ensuring everything runs smoothly from day one.

Pump Services: Installations, Repairs & Replacements
Key plumbing components like sump pumps sewer ejector pumps are vital for flood prevention and wastewater management — and that’s where CMM Septic comes in. We handle installations, repairs, and replacements of sump pumps and sewer ejector pumps with expert care.

Slab Leak Detection & Repair
Worried about a leak under your concrete? We use advanced tools to detect and repair slab
leaks quickly—preventing serious water or structural damage with minimal disruption. Our 24/7 plumbers are ready to handle leaks detection and leak repairs day or night, rain orshine.

Frozen & Burst Pipe Repair
Frozen or burst pipes can seriously damage your plumbing and septic system. CMM Septic
responds fast to minimize damage and restore function. With expertise in both plumbing
and septic, we deliver lasting solutions you can trust.

Backflow Prevention & Certification
Protect your drinking water from contamination with expert backflow prevention. Our licensed team provides testing, certification, installation, and maintenance—ensuring full compliance with local codes and health standards. We use the latest tools to keep your
water clean and safe.

Emergency Plumbing Services
Plumbing disasters don’t wait for the right time — and neither do we. CMM Septic provides emergency plumbing services to handle urgent issues like pipe bursts, tough clogs, leak repairs and heater repairs. Our licensed & emergency plumbers are always on standby, ready to respond quickly and restore your home’s comfort and functionality.
We’ll be there when you need us the most
Emergencies by their very nature are abrupt and unpredictable – events that you can never be prepared for. The one thing you can count on is CMM!
Get Your Free Quote!
(631) 561-5555
Signs You Need An
Emergency Plumbing Repairs
Plumbing emergencies don’t wait—and neither should you. Whether it’s a burst pipe or a blocked drain, delaying urgent plumbing repairs can lead to costly damage. If you’re searching for a 24/7 emergency plumber near you, here are signs it’s time to call us now.
- Sudden drop in home water pressure or complete water loss
- Burst or leaking pipes causing stains, mold, or flooding
- No hot water or strange noises from your water heater
- Clogged drains or overflowing toilets that resist DIY fixes


Service Areas Across Long Island
Proudly serving communities throughout Suffolk County and Nassau County, CMMSeptic delivers fast, professional cesspool, septic, and plumbing solutions where and when you need them. Below are just a few of the key areas we cover.
- Mattituck
- East Hampton
- Southold
- Hampton Bays
- Southhampton
- Cutchogue
- Sag Harbor
- Calverton
- East Quogue
- Greenport
- Laurel in Suffolk
- Westhampton Beach
- East Moriches
- Water Mill
- Westhampton
- Montauk
- Aquebogue
- Shoreham
- Bridgehampton
- Amagansett
- Remsenburg-Speonk
- Orient
- Peconic
- Jamesport
- East Marion
- New Suffolk
- Wainscott
- Moriches
- Sagaponack
Frequently asked Questions
How often should I get my cesspool cleaned?
The frequency of cesspool cleaning depends on the size of the tank, the number of people using it, and the amount of waste generated. Generally, it is recommended to have your cesspool cleaned every 1-3 years.
How long does a cesspool cleaning take?
At CMM we do a thorough service. Please allow for at least an hour, sometimes less or more depending on what the service involves.
Is it necessary to be home during the cleaning process?
Yes, we prefer someone be home at time of service for a number of reasons. For one, we need someone home to run water so that we can be sure all water is successfully flowing throughout your system properly.