Residential plumbing · Denver Metro, Colorado
Shower valve repair and replacement
A dripping showerhead, stiff handle or shower that swings hot and cold usually needs a new cartridge. Older two-handle valves without pressure balancing may need to be replaced, which means getting access to the valve behind the wall.
The valve behind your shower handle mixes hot and cold water and, in most modern valves, balances pressure so a flushing toilet doesn't scald or freeze you. The trim pictured here, oil-rubbed bronze with a single lever and matching spout, is on a pressure-balancing valve like the ones we service.
Cartridge problems
Cartridges wear and collect minerals. Symptoms: dripping from the head or spout when off, a stiff or loose handle, reduced flow, or temperature that won't hold. Replacing the cartridge is done from the front after removing the handle and trim, no tile work needed.
Pressure balance and scalding
Pressure-balancing valves hold the hot-to-cold ratio steady when pressure changes elsewhere in the house. If your shower swings when someone flushes, the balancing spool may be stuck or worn. Older two-handle valves often have no balancing at all; the fix is a modern valve.
Replacing the valve body
Replacement means opening the wall: either through the tile around the valve, or from the back side if there's a closet or access panel. Large trim plates can sometimes cover a modest opening. We look at your wall before recommending an approach.
Diverters, spouts and trim
Tub spouts with diverters wear and leak, sending water out the spout while the shower runs. Spouts are replaceable; the type (slip-on or threaded) matters. Trim kits must match the valve brand and model, which is why a photo of your handle helps.
Pressure-balancing vs. thermostatic valves
A pressure-balancing valve reacts to pressure changes, keeping the ratio of hot to cold steady when someone flushes. It's the standard single-handle valve in most homes. A thermostatic valve senses temperature directly and holds it even more precisely; it often has separate controls for temperature and volume. Thermostatic valves cost more and are common in higher-end remodels. Both protect against sudden scalding.
Shower heads and flow
Colorado's SB14-103 requires showerheads sold in the state to be WaterSense-labeled, which means 2.0 gallons per minute or less. If you're replacing a valve, the trim and head can be updated at the same time. A weak shower is often a mineral-clogged head; soaking or replacing it is a quick fix.
What to tell us when you call
A photo of the handle and trim is the fastest way to identify a valve. Mention whether it's one handle or two, whether the shower and tub share a valve, how old the bathroom is, and what the problem is: drip, temperature swing, stiff handle or low flow. If there's a closet or access panel behind the shower wall, say so; it can change the approach completely.
Signs your shower valve needs service
- Shower drips after shutting off
- Temperature swings when someone uses water
- Handle is stiff or loose
- Low shower flow
- Water comes from the spout while the shower is on
- Can't get hot enough
How a visit goes
- Identify the valveBrand, model and age from the trim.
- Repair from the frontCartridge, stops and seals when possible.
- Plan replacement if neededAccess options explained.
- TestTemperature, balancing, no drips.
What's different here
- Mineral buildup. Scale collects in aerators, cartridges and fill valves.
- Mid-century homes. Many 1950s–70s homes have original two-handle valves without pressure balancing.
- Exterior walls. Showers on exterior walls can freeze in cold snaps if insulation is poor.
What affects the cost
Every home is set up differently, so we price the job after we've seen it. These are the things that move the number.
- Cartridge vs. valveCartridges are far less work.
- AccessTile, closet, or access panel.
- Brand and partsDiscontinued valves cost more to service.
- Trim kitNew finish or matching existing.
- Diverter or spoutType and condition.
- Tile repairSeparate trade if tile must be opened.
Questions we hear
Why does my shower turn hot when someone flushes?
The pressure-balancing spool is worn or stuck, or the valve doesn't have one. A cartridge or valve replacement fixes it.
Can a shower valve be replaced without removing tile?
Cartridges and trim can. The valve body needs access, either through tile or from behind the wall.
Why does my showerhead drip?
The cartridge isn't sealing. It's usually a cartridge replacement.
Can I change my trim to a new finish?
Yes, if the new trim matches your valve brand and model.
Why does water come from the spout with the shower on?
The tub spout's diverter is worn. Replacing the spout usually fixes it.
How long does a cartridge replacement take?
Usually a short visit if the part is available.
What's the difference between pressure-balancing and thermostatic valves?
Pressure-balancing valves keep the hot-cold ratio steady when pressure changes; thermostatic valves hold a set temperature directly and often separate temperature from volume.
Why is my shower weak?
Often a mineral-clogged showerhead or a worn cartridge. New showerheads sold in Colorado are also limited to 2.0 gallons per minute.
Can I change from two handles to one?
Yes, but it means replacing the valve body behind the wall, which needs access through the tile or from behind.
Will a new cartridge fix a dripping showerhead?
Usually. A drip from the head or spout after shutoff is the classic worn-cartridge symptom. The cartridge has to match the valve brand and model.
Related services
Water Heater Repair & Replacement
Tank water heaters that leak, run out of hot water or won't light. Repaired when it makes sense, replaced when it doesn't.
Faucets, Toilets & Fixtures
Dripping faucets, running toilets, tired shower valves and new fixtures you've picked out.
Shower valve repair and replacement near you
We're based in Thornton and work across the Denver Metro:
Emergency plumber by city
Water leaking now? Shut off the main, then call.
Something leaking, dripping or cold?
Call and tell us what's going on, or pick a time online. If it's not something we handle, we'll say so.