Tankless Water Heater


Tankless Hot Water
Heater Experts


Tankless Water Heater

Service & Maintenance

Leaks are more than an annoyance – they can wreak havoc on your home. We repair and replace everything from fixtures to pipes and valves. Nobody likes a cold shower, if your water heater isn't functioning properly we have the know how to fix or replace it, too.

Remodels & Additions

Remodeling a bathroom as part of a renovation project adds functionality and value to your home. New shower and tub systems are more than a place to get clean, they are a place to spend time and relax. Want to add an extra kitchen/bath for an Airbnb or mother in law suite? We are the experts.

System Upgrades

Do you have rust in your water? Is your system at the end of its life? Replace aged galvanized pipes and old drains with a new system designed to last the life of your home.

New Construction

From a small cabin to a high-end custom home, Grand Bison is a full service plumbing contractor. We have experience plumbing new homes and businesses all across the state of Colorado.

Our Master Plumber

Robert Malunat Master Plumber Profile 2

Robert Malunat


Robert Malunat is a licensed Colorado Master Plumber and owner of Grand Bison. After years of employment with a large plumbing/mechanical contractor he decided to start Grand Bison with the same dedication to quality work and attention to detail he had been applying throughout his career.

When not working, Robert enjoys snowboarding, hiking and international travel. As a Denver Metro native he believes that continuing growth responsibly is paramount to the prosperity of our rocky mountain community and environment


Water Heaters Installed


Hours of Education


Hours of Plumbing Experience


Satisfied Customers