About Us

We started United Plumbing in November of 1981 with the goal of being a business that would have a reputation of quality workmanship, excellent service, and efficient production.  With the growth of our company it is a testimony that these goals are being accomplished, and must continue to be, in order to maintain our excellent reputation in the plumbing industry.

The reputation of honesty and integrity that we have developed over the years of service to our customers is our greatest asset. We treasure the reputation that we've cultivated through partnering with out clients on their projects and we will continue to invest in being a company that is not only a preferred partner but the best choice for our customers.

We look forward to talking to you about your project's requirements. Please call or email us, or submit a bid request online.

Best Regards,

Bill Sieh

Owner, United Plumbing
(360) 794-5557

What does United Plumbing do?

We have chosen to specialize in most types of new construction, commercial, and full remodel plumbing including tenant improvements for commercial. We do not do residential service calls for consumers. This allows us to be more efficient and competitive on the projects we bid on.

Our expertise

  • Single-Family Residential New Construction
  • Multi-Family New Construction
  • Townhome New Construction and Remodels
  • Residential Remodels
  • Custom Homes
  • Residential Fire Protection (13D)
  • Light Commercial
  • Tenant Improvements (commercial)
  • Repipe (residential and multifamily)
  • Gas Piping