Commercial Water Leak Detection in Portland, OR
Non-invasive leak detection for apartment buildings, restaurants, retail spaces, office buildings, and HOA properties across the Portland metro. We locate the exact failure point before anything is opened or excavated.
Written report for insurance & water district
Detection only — no repair conflict
Multi-zone & multi-unit systems
Portland Water Bureau documentation
What Makes Commercial Leak Detection Different in Portland
Commercial properties in Portland run larger pipe systems, serve more people, and carry higher consequences when something fails. A slab leak under a restaurant kitchen or a supply line failure in a 12-unit apartment building is not just a plumbing problem — it is a liability, a tenant issue, and a water bureau billing problem all at once.
Does shutting down the water main affect your business during detection? Usually not. Zone isolation is brief and targeted — we isolate the specific branch we are testing, confirm the pressure drop, then restore it. Most commercial detection does not require a full building shutoff, and when it does, it is measured in minutes, not hours.
Portland Water Bureau serves most commercial addresses inside the city limits. Tualatin Valley Water District covers most of Washington County. Both offer leak adjustment credits for commercial accounts — but they require documentation. Meter readings, pressure test results, and proof of repair. That written report is included in every visit we make, commercial or residential.
Portland’s commercial building stock varies as much as its residential. Inner SE and NE buildings from the 1940s and 1950s often have galvanized or early copper supply lines. NW Industrial and Pearl District properties from the 1980s and 1990s frequently have polybutylene or CPVC. Newer mixed-use construction uses PEX. Knowing what is in the building shapes how we approach detection — we confirm the pipe material at the start of every job.
Can you detect a slab leak in a commercial building with HVAC noise and foot traffic? Yes. We account for ambient noise in commercial settings by how we position equipment and sequence zones. Acoustic amplification cuts through most building noise, and when it does not, tracer gas combined with acoustic tracing locates the failure point with the same precision.
Schedule Commercial Leak Detection
Call or text with your property address and what you are seeing — unexplained water bill, warm floor area, tenant complaints, or a meter spinning overnight when the building is closed. We will tell you exactly what to expect and how long it takes.
Mon–Fri 8AM–6PM · Sat 9AM–4PM · Sun by appt
2455 NW Nicolai St, Unit 200, Portland, OR 97210
Commercial Leak Detection Services We Provide
Every type of commercial water leak that shows up in Portland properties — apartment buildings to restaurants to HOA common areas.
Multi-Unit Residential & Apartment Buildings
A slow slab leak in a 6-unit or 20-unit building can damage multiple units before anyone connects the elevated water bill to a pipe failure. We isolate by unit supply branch to identify which zone is losing pressure, then trace acoustically to the exact point. Minimal tenant disruption, clear written documentation for the property manager and insurer.
Restaurant & Food Service Properties
Restaurant kitchens run high-pressure hot water lines under concrete slabs. A pinhole leak presents as a warm floor, unexplained moisture near the line, or a water bill that does not match usage. We work around service hours when possible and complete zone isolation and acoustic tracing in a single visit with no damage to the kitchen.
Retail & Office Buildings
Slab-on-grade retail and office buildings in Portland use copper or PEX supply runs embedded in or below the slab. Leaks here tend to be slow and go undetected until flooring damage or mold appears. Pressure isolation by zone identifies the branch; acoustic equipment finds the point without opening anything or disrupting occupants.
HOA & Common-Area Plumbing
Common-area supply lines, irrigation laterals, and shared plumbing systems in HOA properties fail in ways that are difficult to attribute to any single unit. We test the shared infrastructure first, then branch into individual lines if needed. The written report gives the HOA board the documentation they need for repair authorization and insurance claims.
Commercial Yard Lateral & Service Line
The water service line from the meter to the building can fail anywhere along its run. In older Portland commercial corridors — inner SE Foster, NE Alberta, NW 23rd — galvanized or aging copper laterals are common. Tracer gas injection and surface sensing locate the failure point without excavating the parking lot or landscaping first.
Multi-Zone Pressure Isolation & Documentation
Every commercial visit includes meter readings, zone-by-zone pressure test results, acoustic findings, and a marked location diagram. Portland Water Bureau and Tualatin Valley Water District both require this level of documentation to process a commercial billing adjustment. Our report satisfies both.
How Commercial Leak Detection Works on a Portland Property
From the first call to a marked location and written report — typically in one visit.
System Review & Meter Reading
We start at the meter to confirm active leak flow and establish baseline usage. For commercial properties, we also review the system layout — number of zones, branch configuration, and known repair history — before any equipment goes in.
Zone-by-Zone Isolation
We isolate sections of the supply system branch by branch to identify which zone contains the leak. In multi-unit or multi-zone buildings, this step narrows the search significantly before acoustic work begins and minimizes the area that tenants or staff are affected by.
Pressure Testing
The isolated zone is pressurized with nitrogen or compressed air. A pressure drop confirms an active failure in that zone and gives us the severity of the loss. Significant drop means an active failure; a slow bleed means a pinhole — both are locatable with acoustic equipment.
Acoustic Tracing
Ground contact microphones and acoustic amplification equipment pick up the sound signature of water escaping the pipe. In commercial settings we account for HVAC noise, foot traffic, and ambient building sounds. We move systematically to the point of maximum signal strength.
Location Mark
We mark the exact point on the floor, slab, or ground. Your plumber or contractor opens that one spot and makes one repair — no exploratory cuts, no guessing, no unnecessary damage to finished floors or tenant spaces.
Written Report
Before we leave: meter readings, zone pressure test results, acoustic findings, location diagram, and pipe material notes. Your property manager, insurer, Portland Water Bureau, and plumber all ask for exactly this. It is included in every commercial visit.
Signs of a Hidden Water Leak in a Portland Commercial Property
Inside the Building
- Water bill spike on a commercial account with no usage explanation
- Warm or soft floor area in a slab-on-grade space
- Tenant or staff hearing running water when everything is off
- Moisture or discoloration appearing at floor level or in utility rooms
- Mold growth at floor transitions or near walls in lower-level spaces
- Unexplained low water pressure in one zone or wing of the building
- Water meter moving overnight when the building is closed
- Recurring moisture claims flagged by insurer or property manager
Outside the Property
- Wet pavement or unusually green ground near the meter box
- Water pooling at the building foundation in dry weather
- Meter box filling with water between reads
- Portland Water Bureau bill flagged as unusually high for account type
- Soft or heaving pavement near the water service lateral entry
- Irrigation meter showing usage when all zones are confirmed off
- Sinkholes or ground depression forming near the main service line
Commercial Leak Detection — Portland Metro Service Area
We serve commercial properties across Portland and the surrounding metro. How long does commercial leak detection take compared to residential? Typically 30 to 60 minutes longer for initial zone mapping on large or complex buildings. Most commercial jobs complete in two to three hours. We cover the full Portland metro within approximately 20 miles.
Commercial Leak Detection — Common Questions
The process is the same as residential slab detection but we account for the ambient noise environment. We start with zone isolation — pressure testing is not affected by noise at all. Once we confirm which zone is failing, acoustic tracing uses calibrated ground contact microphones that are designed to separate pipe noise from background noise. In high-ambient environments we may schedule during quieter periods, like early morning before the business opens, or we supplement acoustic tracing with tracer gas, which does not rely on sound at all. Most commercial slab jobs complete in one visit regardless of the building type.
Yes. Zone isolation lets us test the shared supply infrastructure first, then branch into individual unit supply lines. If the shared main holds pressure but one unit’s branch drops, the failure is in that unit’s supply. We can usually narrow it to a specific unit or section of the building without entering every unit — the pressure test tells us where the loss is before acoustic work confirms the exact point. This minimizes disruption to tenants who are not affected.
Yes, and we do it on most commercial jobs. Property managers can be present for the full detection visit or we can brief them by phone immediately after. The written report is formatted so a plumber picking up the repair can read the zone findings, locate the marked point, and make the repair without us being on site. We provide the report directly to an insurer or water district contact on request.
Portland Water Bureau asks for evidence of the leak and proof of repair. Our written report covers the leak evidence side: meter readings showing active flow, zone pressure test results, acoustic findings, and the location diagram. You will also need a licensed plumber’s repair invoice. PWB reviews the two billing periods surrounding the usage spike and adjusts the overage. Contact PWB directly after the repair is complete; they walk you through their online form. TVWD has a parallel process for Washington County commercial accounts and our report satisfies both districts.
Usually not fully. Zone isolation requires brief pressure shutoffs to specific branches — typically 5 to 15 minutes per zone — rather than a full building water shutoff. In most commercial properties we can isolate and test one zone while others remain live. If a full shutoff is required for any step, we will tell you in advance so you can notify tenants or plan around service hours. For restaurants, we try to schedule around opening and service windows whenever the situation allows.
Commercial Leak Detection in Portland — Call or Text Anytime
Same-day appointments available for active leaks. Tell us your property type, address, and what you are seeing and we will give you a straight answer on next steps.
(503) 914-2356 — Call or Text Now
No opening. No destruction. Just the location and a plan to fix it.