CO-PI Plumbing and Drain works in two footprints, and which one applies depends on the job. Our residential team serves homes in the Denver and Boulder metro areas. Our commercial and construction crews cover a much wider stretch of the Front Range, from Fort Collins down to Colorado Springs, working with businesses, property managers, and general contractors on everything from a backed-up restaurant main line to a core and shell build.
We’ve been doing this for over 21 years as a family-owned company, and the same licensed technicians handle the work whether the address is a house in Denver or a tenant finish in Castle Rock. Find your city below, or call (720) 930-7125 and we’ll tell you right away if we can help.

If you own a home in the Denver or Boulder metro, our residential team handles water heater repair and replacement, drain cleaning, sewer line repair, gas line work, and hydro jetting. We also install Low NOx and Ultra-Low NOx water heaters and furnaces as Colorado’s air quality rules change what homeowners can put in. Most residential requests get a response within 24 to 48 hours.
Residential plumbing for homes across the Denver metro, from water heaters to sewer lines.
Residential plumbing for Boulder-area homes, handled by the same team that serves Denver.

Commercial work takes us much farther from home. We serve restaurants, office and retail buildings, multifamily properties, and active job sites with commercial drain cleaning and hydro jetting, sewer line repair and excavation, backflow testing, commercial water heaters, gas line installation, and new construction plumbing for core and shell and tenant improvement projects.
Restaurants, multi-tenant buildings, and GC projects across Denver and its suburbs.
Commercial service and construction plumbing for businesses and builders in the Springs.
Commercial plumbing and tenant improvement work for Boulder businesses and property managers.
Service and construction plumbing for Douglas County businesses and job sites.
Also serving: Aurora, Lakewood, Arvada, Wheat Ridge, Littleton, Englewood, Centennial, Westminster, Thornton, Broomfield, Commerce City, Bennett, Watkins, Strasburg, Pueblo, and surrounding communities.
Everything will be okay, we are here to help!
Plumbing work on the Front Range doesn’t follow one set of rules. Each city has its own permitting office, and each water provider sets its own backflow testing and reporting requirements. Denver Water, for example, requires annual backflow testing for most commercial properties, irrigation systems, and multi-unit buildings, and the results have to be filed with the district.
We pull the permits, coordinate the inspections, and submit backflow test results to the right city or water district for you. If you manage properties in more than one city, that means one plumbing company keeping track of several different processes, so you don’t have to.

Heather MannTrustindex verifies that the original source of the review is Google.
Great experience- super impressed and we’ve had lots of plumbers! We had a gas leak, which they addressed- worked with the city and Excel. Excellent communicators!Adam BTrustindex verifies that the original source of the review is Google.
Impressed! They do incredible work. Professional, very knowledgeable, and thorough. What they did is art! They got it done same day. Exceptional! Highly recommend!Joanne LaPortaTrustindex verifies that the original source of the review is Google.
I needed the main isolation valve replaced in the house as it was plastic and stripped. I then needed the supply line to our refrigerator replaced as the original was plastic and leaking. I also had them replace a leaking kitchen faucet. I called on a Saturday and they were here Sunday morning right on time! The Plummer was knowledgeable, respectful, pleasant and tidy. He, and the office personnel were so kind and patient. Due to the quality of work, I am having them return to work on some other plumbing issues in my house! I highly recommend this company!Madison MarzarioTrustindex verifies that the original source of the review is Google.
CO-PI was amazing. I had a commercial plumbing issue and they were quick to respond and super communicative on what the issues were. Their prices are also super fair. I’ll be using them for commercial and residential needs! Thank you again co-pi!Colleen BenderTrustindex verifies that the original source of the review is Google.
The Team that fixed our drain clog was extremely nice, professional, and cleaned up after the mess! Overall great service. Will definitely call these guys again If we have any plumbing needs!Bob TillTrustindex verifies that the original source of the review is Google.
They came when they said they were coming. Did a good job evaluating the problem and promised to get back with a time line and cost.Chris GambleTrustindex verifies that the original source of the review is Google.
This plumbing vendor is the best in the business. All of their technicians are knowledgeable with years of experience. The technicians and office staff are very communicative. The turnaround time for an onsite call is usually within 24 hours. This is my most reliable and dependable plumbing contractor.Motorsport Masters InfoTrustindex verifies that the original source of the review is Google.
Extremely professional and honest to the core. Can’t say enough good things about how this company does business. This should be your first and only call if you are in need of any plumbing services!S WareTrustindex verifies that the original source of the review is Google.
Chris and Jeff are awsome. I like the fact they new prices off the top of their heads and not using a tablet, push upsales, etc. I finally found a company that actually seem genuine, a real company that cares and not about the bottom line. Only if I found your company sooner, like 3 years sooner. I will diffently call you back in the future and refer you to family and friends.Google rating score: 5.0 of 5, based on 221 reviews
Call (720) 930-7125 or send a service request with your address and a quick description of the problem, and we’ll confirm coverage and get you on the schedule.