About The Katy Plumbing Company. The Katy Plumbing Company is one of the area’s  premiere plumbing companies.  We ensure every project completed by us will meet or exceed your expectations.  All of our service professionals are pre-screened before they are employed with our company so you can rest assured that you are in a safe environment.  Please call today to talk with one of our professionals about your home project.  Thank you for your time and consideration.