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

Brian Walsh
Brian Walsh
@brian_walsh
I highly recommend CMM Cesspool Service. They have installed a new septic system at my house which was required by Suffolk county health department. CMM made the process seamless from all around and did an amazing job. Not to mention, when they completed the job, the finish grading was ready for grass. I have also use their site work division to excavate for a basement extension. Again great work and will certainly recommend and use again as much as possible. Consult with CMM with confidence. (Basement excavation photos attached for reference as well).
William Bedell
William Bedell
@william_bedell
Things happen for a reason. This is way overdue. Couple weeks ago I was having issues. When I called and explained them Robyn was very informative, kind and professional. I learned what another company had done twice in the past wasn’t the proper thing. I called on a Monday night and they came Tuesday morning at nine and were finished by two. The guys are very professional, efficient and neat. I have a septic tank and an overflow tank and where they dug and worked It looks like it was barely even touched; minus the sprinkler line sticking out which is no big deal. It just looks like I have two minor dead patches. There was one minor issue about where to dump excess dirt but it was rectified immediately. Incredible company, don’t go with anyone else.. They really know their sh1t! Pun intended. I will be using them again in a few years. Thank you!! Picture 1/3 septic tank. 2/4 overflow. The after photos compared to the during are insane. Hope these guys got a good commission! And the price for what was done wasn’t much more than what was done
Nazil Mohammed
Nazil Mohammed
@nazil_mohammed
Called in due to backed up basement. Althoug it was pouring rain out, Jose and his guy came through and were very respectful, knowledgeable and friendly. Would gladly recommend and use this service again. A+ thanks for the great work guys.
David Rice
David Rice
@david_rice
CMM is an amazing company that I’ve used not only for my home, but on several different occasions for work. I am a real estate investor that flips several homes a year and I’ve need CMM to work on many of those projects. I would highly recommend them!
Ines Morales
Ines Morales
@ines_morales
Wow - what a great experience working with CMM. Robyn was super helpful over the phone, and provided an abundance of information. Jose and Cris were amazing. It was immediately clear that they knew what they were doing. They answered all of my questions, were respectful and courteous and took their time doing the job right. CMM is top notch, I highly recommend them.

24/7
Emergency Plumbing Services

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.

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.

Frequently asked Questions

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.

At CMM we do a thorough service. Please allow for at least an hour, sometimes less or more depending on what the service involves.

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.

Days
Hours
Minutes
Seconds

—Memorial Day Special Offer —

Memorial Day Special Offer Enjoy 10% OFF
Use Code: MEMO25