File 001

Opening the file

Private IPlumbing

Professional Plumbing Services | Private I Plumbing

Seattle & the Pacific Northwest

Private I Plumbing

Residential plumbing

File 001

Status Open

Private I Plumbing

Every Leak Tells a Story.

Professional Plumbing Services | Private I Plumbing

We investigate residential plumbing problems, find the cause, and make the repair. From water heaters and hidden leaks to water pressure, repiping, drains, and the lines serving your home, we follow the evidence from the first clue to the final solution.

Seattle & the Pacific Northwest

Request ServiceHow a case works

The agency

Plumbing leaves clues.

Private I Plumbing is a residential plumbing company built on a detective idea: every problem has a cause, and the cause is what we find first.

File · Agency

We are not trying to look like every other plumbing contractor. The private-investigator theme is the brand — sophisticated, black and gold, Pacific Northwest — not a costume.

A leak leaves evidence. A failed water heater has a cause. Low pressure has clues. We investigate the problem, name the diagnosis, and solve the case.

Based in Seattle & the Pacific Northwest, we take residential calls seriously and leave the work documented.

Professional Plumbing Services | Private I Plumbing

The path

How a case works

Evidence, then the cause, then the repair. The same order on every call.

  1. Evidence

    Water where it should not be. Corrosion on a fitting. A sudden change in pressure. A water heater that stops keeping up. Every sign can tell us something about what is happening inside your plumbing system.

  2. Investigation

    We trace the signs back through the system to find where the problem started. The visible symptom is only part of the case. The cause is what matters.

  3. Diagnosis

    Once the evidence points to the source, we identify the problem and explain what is happening. No guessing. No treating the symptom without understanding the cause.

  4. Solution

    With the cause identified, the appropriate repair or replacement is completed correctly. The goal is simple: solve the problem and leave the plumbing in proper working order.

The difference

Why open a case with us

Don't guess. Investigate. The repair comes after the cause is clear.

  • 01

    Diagnosis before repair

    We name the problem before the wrench turns. The house tells a story; we read it first.

  • 02

    Real cause, not guesswork

    Symptoms are clues. We follow the evidence to the pipe, valve, heater, or line that failed.

  • 03

    Documented work

    Scope, findings, and the fix — left clear so you know what was found and what was done.

  • 04

    Local residential focus

    Seattle and the Pacific Northwest homes we know. Residential plumbing, handled like a case file.

Residential plumbing

What we investigate and repair

Every call starts with a problem. Our work is to follow the clues, identify the cause, and complete the repair.

01

Water heaters

Leaking tanks, failing components, aging units, and heaters that no longer deliver the hot water your home needs.

02

Hidden leaks

Water can travel away from its source before it becomes visible. We investigate the signs and trace the leak back to where the case began.

03

Water service

The line connecting the meter to your home can fail, leak, or restrict flow. We investigate the service line when the evidence points beyond the fixtures.

04

Water pressure

High or low water pressure is a clue, not always the cause. We trace the pressure problem back to its source.

The Case of the Disappearing Water Pressure

05

Repiping

Sometimes the problem is not one fixture or one connection. When the piping itself has become the issue, we investigate the condition of the system and determine the appropriate path forward.

06

Valves

A valve that leaks, sticks, or fails to shut off can create a larger plumbing problem. We identify the failure and address the source.

07

Drains

Slow drains and recurring backups leave clues. We investigate what is affecting the drainage system rather than simply treating the symptom.

08

Tankless water heaters

Scale, fault codes, poor performance, and tankless water heaters that stop delivering reliable hot water can all point to an underlying issue.

09

Gas piping

New gas lines, corrections, and related plumbing work completed according to the requirements of the job.

10

Code corrections

When existing plumbing does not meet current requirements, we identify what needs to be corrected and bring the affected work up to code.

SwipeScroll

Not listed

Tell us what you are seeing

If the problem does not match anything on this rail, it is still a case we can open.

Request Service

Closed files

Recent cases

Actual service calls become case files — evidence, investigation, solution. Case closed.

Sample file · Case 04 · Water heater

The Case of the Water Where It Shouldn't Be

The Case
The customer found water on the floor beside a tank that was still making hot water.
The Evidence
  • Corrosion at the base of the tank
  • Age past a typical service life
  • Moisture limited to the heater closet
The Investigation
Private I Plumbing traced the water to the tank itself, not a supply line or a drain.
The Solution
The failed water heater was replaced, and the connections were redone correctly.

Case Closed

All recent cases

Jurisdiction

Where we take cases

Seattle & the Pacific Northwest. If you are nearby and seeing water, pressure, or plumbing that does not add up — open a file.

  • Arlington WA
  • Bellevue WA
  • Bothell WA
  • Edmonds WA
  • Everett WA
  • Issaquah WA
  • Kenmore WA
  • Kirkland WA
  • Lake Forest Park WA
  • Lynnwood WA
  • Marysville WA
  • Mercer Island WA
  • Mill Creek WA
  • Monroe WA
  • Mountlake Terrace WA
  • Mukilteo WA
  • Newcastle WA
  • Redmond WA
  • Sammamish WA
  • Seattle WA
  • Shoreline WA
  • Snohomish WA
  • Woodinville WA

Not sure we cover your neighborhood? Call and ask. We will tell you straight.

Request Service

Open a case

Tell us what you are seeing

Describe the symptoms. We will investigate the cause and recommend the right repair.

Service request · New case file

Intake

Prefer to talk it through?

(425) 220-9489

File details

What you can count on

The trust file — how we show up, how we work, and what we leave behind.

Confidential · Service file

Verified
Licensed & insured
Professional residential plumbing under proper licensing and coverage for the work we take on.
Diagnosis-first
We investigate before we sell a repair. The cause is identified, then the solution is recommended.
Written scope
You see what we found and what we propose to fix — before the work proceeds.
Respect for the home
Shoe covers, clean work areas, and a site left as orderly as we found it — or better.
Clear communication
Plain language on findings, options, and timing. No mystery after the investigation.

Credentials and guarantees can be confirmed on request. Placeholder details until licensing copy is finalized.

Testimonials

What they saw

Customers filed these statements on Google.

5 out of 5

“Great experience working with Mark! He was responsive on a holiday weekend. I had a water heater leak that caused flooding, and Mark was able to come by on a Sunday, and replace my water heater. He was knowledgeable and helpful, and went above and beyond what I expected. I live in a fixer upper, and I will definitely be calling on Mark to be my new plumber. Thank you!”

TJ ThreeGreenBananas

Google review (opens in a new tab)

5 out of 5

“Mark was great! Had a plumbing issue in a late Sunday evening. He came within less than an hour and quickly identified the issues and what needed to be done. While he was at the condo, he also took time to look at an issue with the bathroom and also helped resolve an ongoing concern. Payment was easy and it's great to work with him as one stop shop for plumbing.”

Elizabeth Walker

Google review (opens in a new tab)

5 out of 5

“We have been dealing with poor water pressure in our home for some time due to old galvanized pipes. Mark came out with his team and navigated challenging site conditions to install a new line from the meter and restore full pressure to our system. We could not be more pleased with our experience working with Private I Plumbing!”

Carter Case

Google review (opens in a new tab)
All testimonials

Interrogatory

Questions we hear

Straight answers before you open a case.

  • Call when you see water where it should not be, pressure that changed, a heater that failed, drains that will not clear, or anything that feels like a plumbing mystery. Early evidence is easier to read.

Direct line

Case Closed.

Tell us what you are seeing. We will investigate it and fix it.

Request Service
(425) 220-9489

Call or text

Seattle & the Pacific Northwest