Mullin Plumbing, Inc. – About Us

Mullin Plumbing, Inc. has been serving the plumbing needs of Oklahoma residents since 1973. The company was founded by Jim Mullin as a drain and septic service provider. In the early 1990s, Jim’s son Markwayne Mullin took over the family business and expanded it into a full-service plumbing company offering installation, repair, and maintenance services.

Under Markwayne’s leadership, Mullin Plumbing grew rapidly. When he decided to leave the company in 2011 to pursue a career in politics, Markwayne handed over the reigns to two long-time Mullin managers – Robert Morris as CEO and Ray Trimble as COO. Rob previously served as Install Manager, while Ray was formerly COO of Mullin Environmental, the company’s septic service brand.

Together, Rob and Ray steered Mullin Plumbing over the next decade. They launched a heating and air conditioning division to complement the company’s plumbing services. They also focused on preserving Mullin’s hometown roots while expanding services and updating operations. Rob and Ray strive to maintain the company’s founding commitment to being reliable local plumbers serving the communities where their employees live and work. 

Now in its 50th year, Mullin Plumbing continues serving the key Oklahoma markets of Tulsa and Oklahoma City. With 105 red service vans on the road, Mullin technicians specialize in the full range of residential and commercial plumbing installation, maintenance, emergency repair services, heating and air conditioning, and septic services.