4.6 
3.1k+ *The Angi rating for Sump Pump Installation companies in O Fallon, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Sump Pump Installation needs.
*The HomeAdvisor rating for Sump Pump Installation companies in O Fallon, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Sump Pump Installation needs.
Last update on May 19, 2025
Serving O Fallon, MO and surrounding areas
Approved
In business since 1974
Free estimates
Warranties offered
"Perma Jack was very responsive and willing to work with the owner of the project to complete a successful waterproofing drainage system. Perma Jack also worked in a very professional manner. I would definitely recommend this company."
+197
Serving O Fallon, MO and surrounding areas
Approved
In business since 2009
Warranties offered
Credit card accepted
"Replaced shutoff valves under sink"
+2
Serving O Fallon, MO and surrounding areas
Approved
In business since 2003
Free estimates
Emergency services offered
"Very impressed with the professional appearance and demeanor of the installers. They initiated a series of pre install checks around the home that solved some issues and found a few problems that needed to be solved before they started. On top of going the extra mile, the install was successful and I'm a very satisfied customer. The manager was responsive and accommodating. Highly recommend Dunn One Hour Plumbing, Heating and Air Conditioning."
Serving O Fallon, MO and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
"I used Mr. Rooter to help me retro fit the existing plumbing for my shower after installing a new tile shower in the master bathroom. They came out quickly, fixed the plumbing in under 2 hours, and installed the new shower head for me. They were professional, on-time, and did a great job."
+7
Serving O Fallon, MO and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1979
Free estimates
Emergency services offered
"He arrived around the time discussed. He was very professional and courteous. He explained all of the different options and explained the procedures. I really like this company. Everyone is really courteous and helpful. The installation had to be sub contracted out. The person who did the installation was on time and did a good job."
+18
Serving O Fallon, MO and surrounding areas
Approved
In business since 2019
Free estimates
Emergency services offered
"It went great !!! He was very professional and did a very good job !! I will definitely recommend Ambassador Plumbing to anyone."
Serving O Fallon, MO and surrounding areas
Approved
In business since 2006
Emergency services offered
Warranties offered
"Very professional and installed the gas line quickly. They also hooked up the new stove."
+3
Serving O Fallon, MO and surrounding areas
Approved
Super Service Award Winner
In business since 2017
Emergency services offered
Warranties offered
"Remove electric water heater and install a new high efficiency gas water heater."
+10
Serving O Fallon, MO and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Credit card accepted
"Great job installing the water heater and the price was nice."
Serving O Fallon, MO and surrounding areas
Approved
In business since 2013
Free estimates
Emergency services offered
"Responded very quickly to my online request, I made an appointment same day, promptly showed up to the appt. Adam was very nice and explained everything that needed to be done. He also told me about a product to get to help keep the drain flowing properly."
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