Start by checking what's actually blocking your flow

Low shower pressure usually comes from one of three places: a clogged showerhead, a closed valve, or sediment in your pipes. Before you call a plumber or replace anything, spend five minutes checking these first. Most of the time, the fix takes no tools and costs nothing.

The showerhead itself is the most common culprit. Mineral deposits from hard water build up inside the holes and restrict flow. If you live in an area with hard water—you'll notice white, chalky buildup on faucets and fixtures—this is almost certainly your problem. The good news is that cleaning a showerhead takes about 15 minutes and works about 80 percent of the time.

Key Takeaways

  • Soak your showerhead in white vinegar for one to two hours to dissolve mineral deposits, then scrub the holes with an old toothbrush and rinse thoroughly.
  • Check the shut-off valve under your sink or where the water line enters your home—it should be turned fully counterclockwise, and a partially closed valve cuts pressure dramatically.
  • If pressure is low everywhere in your home, not just the shower, the problem is likely in your main line or water meter, and you should contact your water company.
  • Replacing a showerhead with a low-flow model designed for high pressure can improve flow while using less water than an old, clogged head.
  • If cleaning and valve checks don't work, sediment in your pipes may require a plumber to flush the line or replace corroded sections.

Clean your showerhead with vinegar and a toothbrush

Fill a plastic bag or small bowl with white vinegar—regular distilled vinegar from the grocery store works fine. You need enough to submerge the showerhead completely. If your showerhead is fixed to the wall and won't unscrew, you can tape a bag of vinegar around it and let it soak in place, though unscrewing it is easier if you can.

Let the showerhead soak for one to two hours. The vinegar dissolves the mineral buildup (calcium and magnesium deposits) that's blocking the small holes. After soaking, use an old toothbrush or soft brush to scrub each hole gently. You should see white or tan sediment come loose. Rinse the showerhead under hot running water for 30 seconds, then screw it back on and test the pressure.

If you see only a small improvement, soak it again for another hour or overnight. Heavily clogged heads sometimes need a second round. If soaking doesn't help at all, the showerhead itself may be damaged or the problem lies elsewhere in your system.

Turn the shut-off valve all the way open

Under your bathroom sink, you'll find two small knobs on the pipes—one for hot water, one for cold. These are shut-off valves. If either one is partially closed, it cuts your pressure. Turn both valves counterclockwise (lefty-loosey) until they stop. They should turn easily; if one is stuck, don't force it.

If the valves under the sink are already fully open, check the main shut-off valve where the water line enters your home. This is usually in the basement, crawlspace, or outside near the foundation. It looks like a larger valve with a handle or a round knob. Turn it counterclockwise until it stops. A partially closed main valve can cut pressure throughout your entire home.

After opening any valve, run the shower for 30 seconds and check the pressure. If it improved noticeably, you've found the problem. If the main valve was partially closed and you had to open it, check it once a month—sometimes they drift closed on their own, especially older ones.

Determine whether the problem is just your shower or your whole home

Turn on the kitchen sink, bathroom sink, and shower. Is the pressure low everywhere, or only in the shower? This tells you whether the problem is specific to the shower or affects your whole water system.

If pressure is low everywhere, the issue is in your main water line, your water meter, or your water company's supply. Contact your water company first—they can check the meter and main line for free. If they find nothing wrong, you may have sediment buildup in your main line, which requires a plumber to flush. This is expensive (usually $300 to $800) but necessary if the problem is widespread.

If pressure is normal everywhere except the shower, the problem is definitely in the shower line or showerhead. Go back to cleaning the showerhead and checking the shut-off valve under the sink. Those two steps solve almost every case of low shower pressure alone.

Replace the showerhead if cleaning doesn't work

If vinegar soaking and valve checks didn't fix it, try a new showerhead. Buy one labeled "high-pressure" or "rainfall" at any hardware store—they cost $15 to $60. Modern showerheads are designed to deliver strong pressure while using less water than older models, so you may actually get better flow and lower water bills.

To replace it, unscrew the old head by turning it counterclockwise by hand. If it's stuck, wrap a cloth around it and use an adjustable wrench—the cloth protects the finish. Screw the new head on clockwise by hand until it's snug, then give it a quarter turn with the wrench if needed. Don't overtighten; you'll strip the threads.

Run the shower for 10 seconds to flush out any debris from the new head, then test the pressure. If a new showerhead doesn't improve things, the problem is in your pipes, not the head.

When to call a plumber

Call a plumber if you've cleaned the showerhead, opened all valves, and pressure is still low only in the shower. The problem is likely sediment or corrosion inside the shower line itself, or a partially blocked mixing valve inside the wall. A plumber can flush the line or replace the valve—costs typically run $150 to $400 depending on what they find.

If pressure is low everywhere in your home and your water company found nothing wrong, you also need a plumber. They can check for leaks in your main line or sediment buildup that's restricting flow. Bring them a list of which fixtures have low pressure and which don't—that information helps them diagnose faster.

Frequently Asked Questions

Can I use something other than vinegar to clean the showerhead?

Yes. Lemon juice works the same way because it's acidic. Baking soda mixed with water makes a paste you can scrub with, though it's less effective than vinegar for mineral deposits. Avoid harsh chemical cleaners—they can damage rubber seals inside the showerhead. Vinegar is cheapest and works best.

Will a water softener fix low shower pressure?

A water softener prevents future mineral buildup but won't fix pressure that's already low from existing deposits. Clean your showerhead first. If you have hard water, a softener will keep the problem from coming back in a few months, but it's a separate investment ($500 to $2,500 installed) and only makes sense if you have hard water throughout your home.

Is low pressure in the shower dangerous?

No. Low pressure is inconvenient but not a safety issue. However, if pressure drops suddenly in your whole home, it can indicate a leak in your main line, which wastes water and money. Contact your water company if pressure changes suddenly everywhere at once.

How often should I clean my showerhead?

In areas with hard water, clean it every three to six months. In soft water areas, once a year is usually enough. If you notice pressure dropping gradually, that's your signal to soak it again. It takes 15 minutes and costs nothing, so don't wait until pressure is terrible.

What if only the hot water pressure is low?

Check the hot water shut-off valve under the sink first—it may be partially closed. If it's fully open, the problem is in your water heater or the line leading to it. Sediment builds up inside water heaters over time. You may need to flush the heater (a plumber can do this for $100 to $200) or replace it if it's very old.