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TRUSTED BY OLNEY, MD HOMEOWNERS

  • Average homeowner rating star icon4.3
    Average homeowner rating
  • Verified reviews icon36
    Verified septic tank services reviews

Top-Rated Septic tank pros in Olney - Updated Nov 2026

Avatar for Pohlman Plumbing Inc
Pohlman Plumbing Inc
4.4(
42
)
Septic System - Install or ReplaceSeptic System - RepairSeptic System - Repair - For Business

Serving Olney, MD and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"Hired Pohlman to evaluate two natural gas tank water heaters in our home, one of which was unoperational. They suggested combi-boiler for our home in lieu of two tank water heaters. They did a great job and we are very pleased. Customer service is top notch, and I highly recommend Pohlman Plumbing."
Finished Shower
Finished Shower
Panoramic View
Vanity
Mid-replacement

+10

Response time8 hrs
Response rate97%
Recommended by86%of homeowners
Avatar for MCS Pumping
MCS Pumping
5.0(
3
)
Septic Tank - Clean or Pump OutSeptic Tank - Clean or Pump Out - For Business

Serving Olney, MD and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

At MCS Pumping, we specialize in grease trap and septic pumping, ensuring efficient and effective waste management for our clients. Our experienced team is equipped to handle various pumping needs, fulfilling both residential and commercial demands. Our commitment is to guarantee cleanliness, safety, and reliability with every service we offer.

Grease Trap Services
Grease Trap Services
Grease Trap Services
Grease Trap Services
Septic Pump

+4

4 neighbors recently requested a quote
Nando Fire Protection & Plumbing
New to Angi
Septic System - Install or ReplaceSeptic System - Install or Replace - For Business

Serving Olney, MD and surrounding areas

Approved

In business since 2013

Free estimates

Offers commercial services

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers' needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. To understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

Avatar for Professional lawns
Professional lawns
5.0(
20
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For BusinessSeptic System - Repair+3 more

Serving Olney, MD and surrounding areas

In business since 2009

Free estimates

Emergency services offered

We are a locally owned plumbing installation and service company. We do not accept anything but top level service and professionalism from our employees and as a customer you will experience that first hand. From water heater replacement and clogged drains or just periodic maintenance and testing to commercial chiller installations we have extensive background in all aspects of the plumbing and gas industry to handle whatever you need including private well and septic needs. Our lead technician has held his master plumbing and gas license since 2009 and personally oversees all jobs. Licensed to operate in almost all 50 states, we are ready to help you with all you plumbing and gas fitting needs. Please ask us about out Customer Referral Discount.

Fusion Car Wash
back of the hotel shows the qty of rooms
Main Street view of the hotel.
George Washington University Hospital
Fusion Car Wash

+26

Recommended by100%of homeowners
Avatar for Heil Plumbing & Hvac
Heil Plumbing & Hvac
4.9(
238
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For BusinessSeptic System - Repair+3 more

Serving Olney, MD and surrounding areas

In business since 1977

Free estimates

Emergency services offered

"This was not an emergency repair, we were fortunate to be able to schedule the replacement about a week in advance. Heil sent an estimator to look at the space and make a recommendation. We originally wanted a Hybrid system but they advised against it given the space and need to collect/vent moisture. We selected a 75 gallon electric water heater. On the scheduled day, They were on time, removed the old water hearter and installed the new one - professional and courteous the whole time. Unfortunately, the new heater leaked the same day. They returned and made a temporary patch until they could return the next day with a replacement part. They returned, replaced the part and after they left we found that the tank leaked again in another place. They returned the next day and before we could insist that we wanted a different tank (clearly an out of the box failure on this one) they said they would replace the tank which they did. Our first, second and third experiences with Heil were all great with customer service and technical expertise. The inconvenience of multiple extra days without hot water and having to be there for four visits was unexpected and unfortunate however Heil responded correctly and made it right. You can get the measure of a company not only when things go right but also how they respond when things go wrong. We would use them again."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+1

Recommended by96%of homeowners
Avatar for Definitive Plumbing & Heating
Definitive Plumbing & Heating
4.4(
106
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For BusinessSeptic System - Repair+3 more

Serving Olney, MD and surrounding areas

In business since 2016

Emergency services offered

Credit card accepted

"The actual replacement was pretty straight forward, but because the codes have changed for normal W/H replacements in our area, which requires an expansion tank and also the new w/h's are now somewhat taller than prior models, they had to do some modifications to the venting. But they handled it professionally, and did exceptionally nice work. Its good to see people take pride in the work they perform. I would definitely call them again when/if the need is required."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+1

Recommended by83%of homeowners
Avatar for Tri-County Pump Service, Inc.
Tri-County Pump Service, Inc.
4.4(
113
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For BusinessSeptic System - Repair+3 more

Serving Olney, MD and surrounding areas

In business since 1991

Free estimates

Emergency services offered

"We were having problems with our septic. 1 st we had the tank pumped. Continued to have problems with backing up. Zack and his helper came out and snaked the clean out pipe. Worked for a couple weeks backed up again. Bryan and his helper came out and snaked the pipe again and ran the camera in the pipe which showed tree roots clogging up the pipe. He then ran a root cutting tool in the pipe. As Bryan was doing all of this he explained everything he was doing and why. I was very impressed with his knowledge. He was excellent. He advised we need a crew to dig up the pipe to the tank. Jay and Cody came out and dug up the pipe and inlet access and found clog mixed with tree roots. They cleaned everything up and all is working. Thank all of you guys for your help. I would recommend all them !"
Recommended by70%of homeowners
Avatar for Capitol City Plumbing LLC
Capitol City Plumbing LLC
4.8(
22
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For BusinessSeptic System - Repair+3 more

Serving Olney, MD and surrounding areas

Free estimates

Emergency services offered

Credit card accepted

Capitol city plumbing specializes in residential service plumbing leaks, repairs ,replacement etc. We also take on commercial projects such as restaurant, salon, apartment etc rough in and fixtures. We pride ourselves in low affordable prices and working with the customer to get the right price for the job. We are generational plumbers who have over 30 years of plumbing knowledge and a license in every plumbing classification. We are ready to work with you and meet all of your plumbing needs.

Plumbing Project
Old Garbage disposal
Plumbing Project
Hole in garbage Disposal
New Garbage Disposal installed

+16

Recommended by100%of homeowners
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Septic Tanks FAQs, answered by experts

A septic tank is an underground container that collects and holds wastewater until it’s sufficiently filtered and broken down. It treats wastewater by separating waste so the leftover liquid can travel into the drainfield where the soil and gravel eventually filter and purify it. This process naturally eliminates bacteria, viruses, and other contaminants.

The best way to keep a septic tank clean is to hire a local septic tank cleaner to inspect and pump the septic tank every three to five years. Be sure to only flush human waste and toilet paper down the toilet, and don’t pour grease, oil, fats, coffee grounds, or food scraps into your drains.

The dimensions of a 500-gallon concrete septic tank can vary from manufacturer to manufacturer, but the tank is large enough to handle the wastewater of a small home with up to one bedroom. Keep in mind that some states have a minimum septic tank size, and this often starts at 750 gallons. A 500-gallon septic tank may be too small to meet local regulations.

Expect to take at least a day to drill your own well by hand. For a 500-foot well, this could take even longer, depending on the makeup of the soil and the terrain you are drilling through. Other factors include your physical strength and overall fitness level and the weather conditions you’re working in.

An outdoor water valve typically has a round or oval handle that you can turn to control the water flow. It may be located in a protective box or pit near the property line, where the main water line connects to your house.

The Olney, MD homeowners’ guide to septic tank services

From average costs to expert advice, get all the answers you need to get your job done.