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Verified Reviews for Septic Tank Service pros in Mandan, ND

*The Angi rating for Septic Tank Service companies in Mandan, ND is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Septic Tank Service needs.

*The HomeAdvisor rating for Septic Tank Service companies in Mandan, ND is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Septic Tank Service needs.

Last update on August 14, 2025

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DB Plumbing and Service LLC
4.8(
2
)
Septic System - Install or ReplaceSeptic System - RepairSeptic System - Repair - For Business

Serving Mandan, ND and surrounding areas

In business since 2021

Free estimates

Warranties offered

We have the experience and we are committed to providing quality workmanship and superior customer service on all our applications. We at DB Plumbing and Service strive to maintain our reputation as a high quality, very service oriented company with our main focus being customer satisfaction.

Response time2 days
Recommended by100%of homeowners
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Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,688
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For BusinessSeptic System - Repair+3 more

Serving Mandan, ND and surrounding areas

In business since 1971

Credit card accepted

"The technician emptied the freezer, which was in the basement, to work on the part that needed repair. Then he neglected to put anything back into the freezer, including a turkey I had bought for Christmas and a rack of ribs. Two days after he left, I went out of town for two weeks. The turkey actually exploded and spewed its liquid all over everything, which had to be discarded. I let AHS know and they couldn't even bother to call me or follow up on this. I'm considering not renewing my contract with them because of the quality (or lack thereof) of many of the providers they send."
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+2

Recommended by65%of homeowners
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Helm Excavating, Inc.
New to Angi
Septic System - Install or Replace

Serving Mandan, ND and surrounding areas

In business since 2020

Free estimates

Offers commercial services

With over 40 years of experience in the Excavation industry, Helm Excavating INC is your industry expert in Bismarck and the surrounding areas. We pride ourselves on our extreme professionalism and attention to detail. Our customer satisfaction guarantee will assure you we will not leave your property until you are completely satisfied with our work. As a family owned and operated business you can trust that we will treat your home as we would treat our own. Give us a call today we look forward to working with you!

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W. Simpson Plumbing Services, LLC
New to Angi
Septic System - Install or ReplaceSeptic System - Install or Replace - For BusinessSeptic System - Repair+1 more

Serving Mandan, ND and surrounding areas

In business since 2012

Free estimates

Credit card accepted

Here at W. Simpson Plumbing Services, LLC, we are a full service plumbing company for both residential and commercial. We are local, family owned and operated, and have a strong focus on customer service. We are fully licensed and ready to take on as much work as possible. Call us today for your free estimate. We look forward to meeting your home's needs.

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Avatar for Bismarck-Septic-Excavating
Bismarck-Septic-Excavating
New to Angi
Septic System - Install or ReplaceSeptic System - Repair

Serving Mandan, ND and surrounding areas

In business since 2010

Free estimates

Offers commercial services

Bismarck-Septic-Excavating is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests and make their concerns the basis of our business.

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Septic Tanks questions, answered by experts

While homeowners connected to a municipal sewer line still have to keep up with plumbing maintenance, the downside to a septic system is that all the maintenance falls on the homeowners. Not calling in a pro to pump the tank every few years or accidentally flushing or draining the wrong types of materials can quickly cause clogs, which can back up into drains around the home.

Your garbage disposal will only affect the health of your septic tank if you’re using it too frequently, or filling it with organic waste that doesn’t fully break down. If the tank fills up with too many solids, the bacteria won’t have enough time to consume it before more is added, which can lead to an overflow in the drain field. Your tank will need to be pumped more frequently with excessive or improper garbage disposal use.

For the most part, choosing between 30/50 psi and 40/60 psi is based on your water-pressure preference. However, it can also depend a little bit on your house—if you have older plumbing, a lower water pressure can be easier on the pipes (and a bit more gentle on your well pump). 

The lower 30/50 pressure is usually enough for a single-story home, but you may want 40/60 if you have multiple stories, as the extra pressure helps water flow smoothly up to the second floor.

A septic system can fail for various reasons, and most commonly, excessive water use or sudden surges in wastewater can overwhelm the system's capacity. Neglecting regular maintenance, like tank pumping and inspections, can also lead to clogs, leaks, and eventual breakdowns. Other issues that lead to failure include age-related wear and tear, root infiltration, improper disposal of non-biodegradable materials or chemicals into the system, unsuitable soil conditions, physical damage, and even environmental factors like flooding or soil erosion.

Yes. A metal detector is one of the quickest and easiest ways to find your septic tank. However, metal detectors can be too expensive (costing upward of $300 in some cases), and not everyone has a metal detector just lying around. If that’s the case for you, you can also take a long metal rod and poke it into the ground at regular intervals until you hit something—likely your septic tank lid.

The Mandan, ND homeowners’ guide to septic tank services

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

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