Not sure what's wrong? We'll find it. Our diagnostic services include video pipe inspections, moisture detection, gas leak testing, and certified backflow preventer services — so you know exactly what you're dealing with before any work begins.
A plumbing inspection before you buy a home costs a few hundred dollars. Discovering a failing sewer line after you close costs tens of thousands. A second opinion on an $8,000 quote from another plumber might reveal that half the work isn't necessary. Diagnostic plumbing isn't glamorous — nobody brags about their backflow test at a dinner party — but it's the work that saves people the most money and the most stress.
We run sewer scopes for home buyers, pressure-test water lines, inspect gas connections, certify backflow preventers, and perform full plumbing evaluations for homeowners who just want to know where they stand. We also offer something simple but rare: a second opinion service. If another company has quoted you major work and something doesn't feel right, bring us in. We'll run our own diagnostics, show you what we find, and give you an honest assessment. If the other plumber was right, we'll tell you that too.
Our diagnostic work exists to give you information, not to generate a sales pipeline. You'll leave every inspection knowing exactly what your plumbing needs — this year, next year, and five years from now.
A sewer scope before closing can save you $20,000 in surprises. The best plumbing investment is the one that buys you certainty.
backflow preventer installation with recirculation pump
Backflow preventer — code-compliant and built to last
plumbing system inspection & valve adjustment
Hands-on diagnostics — our team inspecting every connection
General inspection of the entire plumbing system.
Inspection of plumbing in commercial properties.
Plumbing inspection during real estate transactions.
Routine yearly inspection.
Inspect plumbing system to locate water leaks.
Inspect pipes for corrosion, cracks, leaks.
Diagnose unknown plumbing issues.
Systematically identify source of plumbing issues.
Use moisture detection tools to locate hidden leaks.
Investigate leaks beneath concrete foundation.
Detect gas leaks in plumbing gas lines.
Perform pressure testing to verify gas line integrity.
Test backflow device to confirm proper operation.
Provide certification documentation.
Install backflow prevention device.
Repair malfunctioning backflow prevention device.
Remove and replace faulty backflow preventer.
Service and maintain backflow preventer.
Based on 116 reviews
“Called Pioneer Plumbing for estimate to replace water heater. Estimate reasonable and got booked for the next day. Ryan, our technician called to let me know he was on the way and did an excellent job installing the water heater keeping me updated on his progress. Will definitely use Pioneer Plumbing again.”
Donna Green
in the last week
“We had a great experience with Pioneer Plumbers, it was easy to book an appointment and Max arrived right in the window. Max did an excellent job quickly diagnosing the issue and fixing it. Very professional, I would recommend pioneer plumbers.”
Rachel Goldhaber
in the last week
“Ryan and Ben did a great job on a tricky issue with our water heater exhaust vent. They both communicated super well and cleaned up the space neatly when they were done. Thanks guys!”
Mitchell Irvin
a week ago
“Great service, responsive and efficient. Max was very professional and friendly, took the time to explain what the issues were and our options. He did a full toilet replacement same day, highly recommend Pioneer Plumbers!”
Lisa Kim
a week ago
Need diagnostics & specialty help in your neighborhood? Find your city below for local availability and service details.
Book an inspection and we'll find the problem, explain your options, and give you a clear price before any work begins.
