Phoenix · 24/7
Water Leak Diagnosis & Repair in Phoenix
Hidden water leaks often go unnoticed until they show up as mold, water damage, or an unexplained spike in your water bill — and they rarely start where the damage appears. Simon diagnoses and repairs every kind of residential leak: behind walls, at fixtures and valves, under the concrete slab, and in underground lines. He finds the true source, explains it in plain terms, and repairs it properly the first time, backed by a 2-year workmanship guarantee.
5.0★ — 576 Google Reviews
AZ ROC #323513 · Bonded & Insured
5.0 ★ — 576 Google Reviews
14 Years Experience
2-year workmanship guarantee
24/7 — 365 Days
Common problems Simon fixes
Water bill spiked with no explanation
An unexplained increase in your water bill is often the first sign of a hidden leak.
Water pressure dropped
Lower water pressure than normal, with no changes to your fixtures, can point to a leak somewhere in the line.
Damp walls or flooring
Damp spots on walls or floors — or a musty, mildew smell — usually mean moisture is getting in from a leak nearby.
You hear running water with everything off
The sound of running water when every fixture is turned off is a strong sign of a leak somewhere in the system.
Warm spots on the floor or cracks in the foundation
Warm patches on flooring can indicate a slab leak, and foundation cracks are worth having checked out too.
How it goes
Call or text Simon
Describe what you're noticing — a higher bill, damp spots, or low pressure — and get scheduled. You can even text him a photo or video of the problem.
Diagnose the real source
Simon inspects in person and traces the leak to its actual cause — a failing fitting, a worn valve, a pipe behind the wall, or a line running under the slab or through the yard.
Repair it right
Once the source is confirmed, Simon explains your options, quotes the work upfront, and makes a repair built to last.
2-year guarantee
Every leak repair is backed by Simon's 2-year workmanship guarantee, so you're covered after he leaves.
Why Simon’s Plumbing
- 14 years diagnosing hard-to-find leaks across the valley.
- Honest recommendations on exactly what needs repair.
- 5.0 stars across 576 Google reviews.
2-year workmanship guarantee on every job.
Frequently asked questions
How do I know if I have a hidden water leak?
Watch for an unexplained jump in your water bill, damp spots or a musty smell, lower water pressure, or the sound of running water when everything is off. Checking your water meter with all fixtures off is a quick test — if it's still moving, water is going somewhere.
How much does a leak repair cost?
It depends on where the leak is and what's causing it — a worn valve is a much smaller job than a pipe behind a wall. Simon quotes the work upfront after diagnosing it, and the price he quotes is the price you pay.
What causes hidden water leaks?
Aging pipes, corrosion, high water pressure, shifting soil, tree roots, and poor past plumbing work are the most common causes.
Do you handle underground and under-slab leaks?
Yes. Leaks under the concrete slab and in underground lines are part of the same diagnosis-first approach — warm spots on the floor, foundation-area dampness, and a meter that moves with everything off are the usual giveaways. Simon locates the leak before any concrete or ground is opened.
Will you fix a leak another plumber worked on?
Yes — redoing failed repairs is a regular part of the job. Simon diagnoses why the original fix didn't hold and repairs it properly, backed by the 2-year workmanship guarantee.
Should I shut off my water while I wait?
If water is actively spreading, yes — shut off the fixture's valve or the main line, then call or text. Simon answers 24/7 and treats active leaks as a priority.