Who to call · Plumber
Low water pressure in shower only? Here's Who to Call
When water pressure drops in only one shower while the rest of the house has normal pressure, the problem is almost always isolated to that fixture rather than the home's main supply. The most common culprit is a clogged showerhead — mineral deposits from hard water build up in the small spray holes and on the internal flow restrictor. Unscrew the showerhead and soak it overnight in white vinegar, then scrub the holes with an old toothbrush. If pressure improves but is still weak, the flow restrictor inside (a small plastic disc) may need cleaning or replacing. The next suspect is the shower valve cartridge — these contain small ports that clog with sediment, especially after city water main repairs that stir up debris. Cartridge replacement is a 30-minute job for a plumber and runs $150–$350 including parts. Single-handle thermostatic valves have additional check valves and filters that may need cleaning. If multiple fixtures lose pressure simultaneously, the issue is the main pressure regulator and you need a plumber to test and replace it.
What's going on
How to fix low water pressure in shower only
Some "low water pressure in shower only" cases look simple, but getting it wrong almost always costs more than calling a pro: hidden leaks, fire risk, code violations, and insurance headaches. A licensed plumber will diagnose the exact cause, use the right professional tools, and stand behind the repair. Most local pros offer free quotes and can visit the same day or the next.
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Plumber
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Symptoms to look for
- 01
Weak or trickling spray from shower head
- 02
Other faucets in the house have normal pressure
- 03
Visible white scale on shower head nozzles
- 04
Pressure improves briefly after cleaning the head
FAQ
Frequently asked questions
Who should I call for: Low water pressure in shower only?
When water pressure drops in only one shower while the rest of the house has normal pressure, the problem is almost always isolated to that fixture rather than the home's main supply. The most common culprit is a clogged showerhead — mineral deposits from hard water build up in the small spray holes and on the internal flow restrictor. Unscrew the showerhead and soak it overnight in white vinegar, then scrub the holes with an old toothbrush. If pressure improves but is still weak, the flow restrictor inside (a small plastic disc) may need cleaning or replacing. The next suspect is the shower valve cartridge — these contain small ports that clog with sediment, especially after city water main repairs that stir up debris. Cartridge replacement is a 30-minute job for a plumber and runs $150–$350 including parts. Single-handle thermostatic valves have additional check valves and filters that may need cleaning. If multiple fixtures lose pressure simultaneously, the issue is the main pressure regulator and you need a plumber to test and replace it.
Can I fix this myself?
Some minor cases can be handled DIY, but most require a licensed plumber to avoid costly rework and safety risks. A free quote takes under a minute.
How fast can a pro come out?
Most plumbers offer same-day or next-day visits for non-emergency issues. True emergencies (burst pipes, gas smell, no heat in winter) are typically handled within 1–4 hours.
How much does it cost to fix?
Costs vary by severity and your location. Submit a free quote request to get real pricing from verified local pros in your area.
What are the signs of: Low water pressure in shower only?
Weak or trickling spray from shower head. Other faucets in the house have normal pressure. Visible white scale on shower head nozzles. Pressure improves briefly after cleaning the head.