Plumbing rough-in installed by Moller's Plumbing Service
Residential Plumbing · Walla Walla & Tri-Cities

Full-Scope Plumbing Services for Every Home

Whether you're dealing with a clogged drain, installing a new water heater, repairing a leak, or planning a remodel, Moller's Plumbing provides dependable residential plumbing solutions with quality workmanship and honest service.

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(509) 540-6913 · Scheduled appointments
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One plumber for the whole house.

Moller's Plumbing Service handles complete residential plumbing — the small repair you noticed this morning and the full installation you've been planning for months.

Whether a homeowner needs a quick fix or an entire system installed, our team carries the job from diagnosis to cleanup. We explain what we find in plain language, quote before we start, and leave the work in a condition we're comfortable putting our name on.

Locally owned 10+ years in the field Scheduled appointments Clear, up-front pricing
Plumber clearing a residential drain line
Drain & Sewer
01 — Drain & Sewer

Drain Cleaning & Sewer Services

Slow drains and backed-up sewer lines rarely fix themselves. We clear the blockage, then look further down the line with camera sewer inspection so you know whether it was grease, roots, or a break in the pipe — and what it will take to keep it clear.

  • Drain Cleaning
  • Hydro Jetting
  • Camera Sewer Inspection
  • Main Sewer Cleaning
  • Sewer Repair
  • Preventative Maintenance
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Newly installed residential water heater with clean copper piping
Water Heaters
02 — Water Heaters

Water Heater Repair, Installation & Replacement

From a pilot that won't hold to a full water heater replacement, we size and install equipment that fits the way your household actually uses hot water — traditional tanks, high-efficiency units, or a tankless water heater when space and demand call for it.

  • Water Heater Repair
  • Water Heater Installation
  • Water Heater Replacement
  • Tankless Water Heater Installation
  • Expansion Tanks & Venting
  • Flushes & Annual Service
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Plumber repairing a leaking pipe under a sink
Leak Detection
03 — Leak Detection

Leak Detection & Pipe Repair

A rising water bill, a warm spot on the floor, a stain on the ceiling. We trace the source with non-destructive leak detection before opening anything up, then handle the pipe repair — including slab leak repair and whole home repiping when the plumbing has reached the end of its life.

  • Leak Detection
  • Slab Leak Repair
  • Pipe Repair
  • Burst & Frozen Pipe Repair
  • Whole Home Repiping
  • Water Damage Prevention
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Large diameter water line installation in progress
Water Lines
04 — Water Lines

Water Line Repair & Replacement

The line between your meter and your home carries everything. When pressure drops, water discolors, or the yard stays wet, we locate the failure and handle water line repair or full water line replacement with proper bedding, fittings, and restoration.

  • Water Line Repair
  • Water Line Replacement
  • Main Shut-Off Valves
  • Pressure Regulators
  • Service Line Upgrades
  • New Line Installation
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New garbage disposal and kitchen drain assembly installed under a sink
Kitchen Plumbing
05 — Kitchen

Kitchen Plumbing

Kitchens take more abuse than any other room in the house. We handle the everyday — garbage disposal installation, sink and faucet work, dishwasher hookups — and the bigger jobs when you're reworking the layout entirely.

  • Garbage Disposal Installation
  • Kitchen Faucet & Sink Installation
  • Dishwasher & Ice Maker Lines
  • Kitchen Drain Repair
  • Pot Filler Installation
  • Remodel Rough-In
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Finished bathroom with marble tile and newly installed plumbing fixtures
Bathroom Plumbing
06 — Bathroom

Bathroom Plumbing & Fixture Installation

Whether it's a running toilet or a full bathroom remodel, the plumbing behind the finish work is what makes it last. We handle toilet repair, tub and shower valves, and fixture installation with the same care we'd want in our own homes.

  • Toilet Repair & Replacement
  • Fixture Installation
  • Shower & Tub Valve Replacement
  • Vanity & Sink Installation
  • Bathroom Drain Repair
  • Remodel Plumbing
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Plumbing rough-in with PEX and copper runs framed into a new build
Pipe Services
07 — Pipe Services

Pipe Services, Repiping & Rough-In

New construction, additions, and repipes are where craftsmanship shows. Every run is planned, supported, and pressure-tested before it disappears behind drywall — so the finished home never has to think about it again.

  • Whole Home Repiping
  • New Construction Rough-In
  • PEX & Copper Repipes
  • Pipe Repair & Rerouting
  • Water & Drain Line Layout
  • Pressure Testing
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Gas piping and mechanical connections installed by Moller's Plumbing
Gas Lines
08 — Gas Lines

Gas Line Installation & Repair

Gas work leaves no room for shortcuts. We handle gas line installation and gas line repair for ranges, dryers, fireplaces, outdoor grills, and generators — pressure-tested and inspected before anything is put into service.

  • Gas Line Installation
  • Gas Line Repair
  • Appliance Gas Hookups
  • Outdoor Grill & Fire Pit Lines
  • Gas Leak Testing
  • Shut-Off Valve Replacement
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Dual tank water treatment and heating equipment installed in a utility room
Water Filtration
09 — Filtration

Water Filtration & Specialty Plumbing

Hard water shortens the life of every appliance it touches. We install water softeners, whole home water filtration, and reverse osmosis systems sized to your water — plus the specialty work that doesn't fit a category.

  • Water Softener Installation
  • Whole Home Water Filtration
  • Reverse Osmosis Systems
  • Filter Changes & Service
  • Recirculation Pumps
  • Specialty Plumbing
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Moller's Plumbing service trucks ready for outdoor plumbing work
Outdoor Plumbing
10 — Outdoor

Outdoor Plumbing

The plumbing outside the walls matters just as much. Hose bibbs, yard lines, and sump pump installation keep water where it belongs — moving away from your foundation instead of toward it.

  • Sump Pump Installation
  • Hose Bibb Replacement
  • Frost-Free Faucets
  • Yard & Irrigation Line Repair
  • Outdoor Kitchen Plumbing
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Plumber inspecting home plumbing during a maintenance visit
Maintenance
11 — Maintenance

Maintenance & Diagnostic Plumbing Services

Most plumbing failures give warning first. Our diagnostic plumbing services and preventative plumbing maintenance catch the small things — a weeping valve, a tired supply line, sediment in the tank — long before they become a repair you didn't plan for.

  • Preventative Plumbing Maintenance
  • Diagnostic Plumbing Services
  • Whole Home Plumbing Inspection
  • Water Pressure Testing
  • Valve & Supply Line Service
  • Pre-Purchase Plumbing Checks
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Plumber working in a modern kitchen

Not Sure Which Plumbing Service You Need?

Whether you know exactly what's wrong or simply know something isn't working correctly, we're here to help. We'll identify the issue, explain your options clearly, and provide the right solution for your home.