Gilbert's Go-To Plumber for Over a Decade

Diagnostic Plumbing is a family-owned and operated plumbing and general contracting company based in Queen Creek, serving the East Valley since Gary Witkowski started the business. Our clients appreciate our attention to detail, and our personal interest in the success of their projects. Our commercial clients appreciate that we care about their guests. We strive to find the best solutions possible to your simple or complex plumbing problems. We look forward to working with you!

We work in Gilbert, Chandler, Mesa, Scottsdale, Tempe, Queen Creek, San Tan Valley, and Phoenix. Most of our calls come from neighbors who found us through someone they trust, and we work hard to keep it that way.

What Makes Us Different

Water Quality: We review each citys annually published water lab test data. We strongly believe this is the only way to get a full picture of the contaminates we need to optimize for when speccing water filtration systems. An in-home water test has its place, but cities source from different water sources throughout the year. A single test on a single day will not demonstrate the full range of contaminants. Learn More →

Drain Cleaning: We offer traditional and high-speed mechanical drain cleaning: a cable-driven system that restores the pipe to its original diameter instead of just punching a hole through buildup. It costs more than a standard snake, but in some circumstances it’s absolutely worth it and it allows us to offer a warranty. Learn More →

Not JUST plumbing: We’re also triple-licensed: plumbing (ROC #327364), carpentry and remodeling (ROC #327365), and general remodeling (ROC #332463). That last one — a B-3 license — lets us general-contract full bathroom and kitchen remodels without bringing in a separate GC. One company, one point of contact, one set of standards.

Ready to Help

Whether it’s a leaking water heater at 6 AM or a bathroom remodel you’ve been planning for two years, call us at (480) 220-1266 or fill out the form above. We’re typically available same day for urgent repairs.