Leaking shower valve cartridge replacement in Pasco
Replaced a leaking cartridge in a Delta Monitor shower valve in a Pasco home. The trim was removed, the worn cartridge came out, and a new cartridge was set into the valve body.
Tri-Cities, Washington
Shower & Tub Valve Repair in Kennewick, Pasco & Richland
Sonlight Plumbing repairs and replaces shower and tub valves for homeowners in Kennewick, Pasco, Richland, West Richland, West Pasco, Prosser, Finley, Burbank, and Benton City: dripping or stiff cartridges, worn stem sets, tub spouts and diverters that will not switch over, trim kits, showerheads, and full mixing valve replacement where the wall is accessible. You get a written price before any work is approved.
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WA L&I: SONLIPL742NL · Service calls start with a $79 dispatch fee (plus tax). The dispatch fee covers travel to the service location and the plumber's arrival. Diagnostic work, repairs, labor, materials, and permits are not included in the dispatch fee and are quoted separately when needed. Any additional work requires customer approval before charges are incurred. How pricing works →
Qualifying Sonlight-supplied work includes a 1-year parts and labor warranty; terms and exclusions apply.
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Quick answer
Why does my shower drip when it is off, or run too hot or too cold?
Almost always the cartridge or stem set inside the valve. The rubber seals wear, hard-water scale builds up, and the valve either seeps past the seals or stops mixing hot and cold correctly. In most cases the cartridge comes out through the trim and is replaced without opening the wall. Sonlight identifies the valve, replaces the worn part, and tests the shower before leaving.
At a Glance
- What this covers
- Single-handle cartridges, two- and three-handle stem sets, seized cartridge extraction, trim kits, tub spouts and diverters, showerheads, handheld kits and shower arms, tub waste and overflow and pop-up drains where accessible, and mixing valve replacement through an accessible rear panel or open wall.
- What it does not cover
- Tile, surround, and drywall repair after an access opening, and full bathroom remodel plumbing, which is scoped as its own project.
- Good next step
- Read the valve-body section below, then call, text, or book.
- Current status
- Call or text us to check current availability.
Signs the valve needs attention
- The shower drips or runs after the handle is fully off
- The handle is stiff, or it turns past where it used to stop
- Water comes out of the tub spout and the showerhead at the same time
- The temperature swings, or you cannot get it hot enough no matter where the handle sits
- Water appears on the floor below the tub, or at the ceiling of the room underneath, when the tub drains
- The trim is pitted or loose and the wall behind it is wet
The work Sonlight handles
- Shower and tub cartridge replacement, including common Moen and Delta cartridges and other standard single-handle cartridges
- Seized cartridge extraction when scale has locked the old cartridge in the valve body
- Two- and three-handle tub and shower stem set repair
- Tub spout and diverter replacement
- Compatible trim kit replacement, and installation of a customer-supplied trim kit
- Showerhead, handheld shower kit, and shower arm replacement
- Tub waste and overflow, tub drain and pop-up assembly, and drain stopper service where the drain is accessible
- Full tub and shower mixing valve replacement through an accessible rear panel or an open wall
- Testing for leaks and correct hot-and-cold mixing before the job is closed
Scope
Cartridge versus valve body: what changes the job
Most shower and tub problems are solved at the cartridge or stem set, which comes out through the trim with the wall closed. A valve body only needs replacing when it is cracked, corroded through, or no longer available in parts. Replacing the body means soldering or fitting a new valve into the supply lines behind the wall, so Sonlight does that work through an accessible rear panel, an existing access door, or an open wall.
Where there is no access, the written scope states where an access opening would be made and that Sonlight does not patch drywall, tile, or surrounds; that finish work is lined up separately. Nothing is opened until the scope is approved.
Customer-supplied valves and trim
You are welcome to supply the valve, trim kit, or showerhead. Sonlight checks that the trim matches the valve body in the wall before the visit when you can send a photo, installs it, and stands behind the plumbing connections; the fixture itself is covered by the manufacturer's warranty between you and the manufacturer. Our customer-supplied fixtures guide explains what to check before you buy.
Remodels
A new tub or shower with a valve rough-in, new supply lines, and new trim is remodel plumbing, scoped as its own written estimate the same way repiping and remodel plumbing is.
The process
How a visit works
Honest, straightforward, and no pressure — here is how Sonlight approaches every job.
1
You tell us what's happening
Share the problem and what you're seeing — by phone, text, the request form, or Book Online.
2
We assess it in person
We look at the actual problem in your home — not a guess over the phone — so the plan fits what is really going on.
3
We explain your options
You get clear options and honest recommendations before any work begins. No pressure, no surprises.
4
You decide
You choose what is right for your home, and the work gets done properly.
You'll get clear options before any work begins, and the valve is tested for leaks and correct mixing before we leave.
A shower valve cartridge replacement in Pasco is documented on this page, and the same evaluation applies in Kennewick and across the Tri-Cities. See all service areas → Questions? Contact Sonlight Plumbing →
Related services
You may also need
Faucet Repair & Installation
The same cartridge and stem wear shows up in sink faucets; repaired or replaced with the shutoffs behind them.
Drain Cleaning
A tub or shower that drains slowly is a drain problem, not a valve problem, and is handled on its own page.
Leak Repair
Water at the ceiling below a bathroom is traced to the valve, the drain, or the supply lines before anything is replaced.
FAQ
Shower & Tub Valves — Questions
Local proof of work
Recent Shower & Tub Valve Jobs in the Tri-Cities
Real jobs, real photos, real Tri-Cities neighborhoods. Completed work appears here only when real project photos are available.
Documented Sonlight work1 documented job for this serviceNewest documented job: September 21, 2026
Honest Plumbing. Clear Solutions.
Have a plumbing problem? Call, text a photo, or send Sonlight the details.
Upfront pricing: booking a visit starts with the $79 dispatch fee (plus tax). It covers travel to the service location and the plumber's arrival. Diagnostic work and repairs are separate and require customer approval before additional charges are incurred. Not ready to choose a time? Send a service request.