A slow shower is usually one of two problems that feel alike: a drain that can't keep up, or a showerhead that can't deliver. Watch where the water goes. If it pools around your feet, look at the drain. If it dribbles out of the head but drains fine, look at the flow.
How do I tell a slow drain from low flow?
Two quick checks sort it out. First, run the tub faucet, or another shower if you have one. If the flow there is strong, the trouble is local to this shower. If flow is weak everywhere in the house, you're not looking at a showerhead problem. Our low water pressure guide and water pressure page are better places to start.
Second, watch the drain with the water running. If water rises around your feet and drains slowly even when the flow from the head is fine, it's a drain problem. If the water drains as fast as it arrives but the spray is weak, it's a flow problem.
Is it a hair clog or something deeper?
Check the other drains in the same bathroom. If the sink and tub drain at a normal speed and only the shower is slow, the trouble is probably close to the shower drain. If several fixtures are slow, the clog may be farther down the line, and that's a job for a plumber. Our slow drain or main line clog guide shows how to tell which you have.
For a clog near the drain opening, start simple:
- Take off the drain cover or stopper if it comes off without tools or force. Check your fixture's instructions if you're unsure.
- Remove the hair and soap buildup you can see and reach. Use a paper towel or gloves.
- Run water and see whether the drain speeds up.
That's as far as we'd go at home. If the drain is still slow, or you'd have to force anything to get at it, stop and call. If you use a store-bought drain product, read the manufacturer's label and safety warnings first, and never mix products.
A simple hair catcher over the drain can help keep the problem from coming back. When the clog is deeper, drain cleaning is the service that clears the line.
What if the showerhead is the problem?
Look at the face of the showerhead. White, crusty deposits around the holes suggest mineral buildup, and buildup can narrow the spray. You may also notice the spray shooting sideways or in uneven streams.
Many people soak a showerhead in white vinegar to loosen mineral deposits. Before you try it, check the manufacturer's care instructions, because vinegar can dull or damage some finishes. If the instructions rule it out, or the head looks pitted or worn, replacing it may make more sense than more scrubbing.
Keep in mind that today's showerheads are built to limit how much water they use. Federal rules cap showerhead flow, so a new head may feel gentler than an old one. What you're looking for is a change: a shower that used to feel stronger and doesn't anymore.
Does Phoenix hard water play a part?
It can leave its mark. Minerals in water can form white, crusty deposits wherever the water dries, including on showerheads and faucets. How much your water carries depends on your provider.
For example, the City of Phoenix's 2025 Water Quality Report lists total hardness of 172 to 302 parts per million across its distribution system. Other providers publish other figures, and some publish none. Look up your own provider's report to see where you stand.
Why does the shower temperature swing?
When someone flushes a toilet or runs a tap elsewhere in the house, the water pressure feeding your shower can shift. Many shower valves are designed to keep the temperature steady when that happens. If yours swings hot or cold, the valve may be worn, or it may not be that type.
Big swings deserve attention, because a sudden blast of hot water is a scalding risk, especially for children and older adults. A plumber can check the valve and tell you whether it can be repaired or should be replaced. Don't take a valve apart on your own.
What if it is both?
It happens. A slow drain and a weak spray can show up in the same shower for two unrelated reasons. Deal with the drain first if water is pooling, since you're the one standing in it. Then work on the showerhead.
Is a tub drain different from a shower drain?
In a tub-shower combination, one drain serves both. A shower-only stall has its own drain. Either way, hair and soap collect in the same places, and the checks above still apply. What changes is how you reach the drain, and that varies by fixture, so follow the instructions for yours.
What can I do to keep it from coming back?
A few habits help:
- Use a hair catcher and empty it often.
- Wipe the showerhead face now and then, before deposits build up.
- Deal with a slow drain early.
- Note any change in flow or drain speed, and the date.
When should I call a licensed plumber?
Call if the drain stays slow after you've cleared what you can reach, if other fixtures in the house are also slow, if water backs up out of a different drain, or if the temperature keeps swinging. Call sooner rather than later if you see water leaking around the fixture or through a wall or ceiling below.
A plumber will ask what you've tried and when the problem started, then look at the drain, the valve and the showerhead as needed. Tell them what you noticed in the sink, the tub and any other showers, because it narrows things down.
Water pooling at your feet points to the drain, and a weak spray points to the showerhead. If yours is still acting up after the easy checks, ask about shower and tub service.
Common Questions
Check the sink and tub in the same bathroom. If only the shower is slow, the trouble is probably close to the shower drain. If several fixtures are slow, the clog may be deeper and needs a plumber.
Many people soak one in white vinegar, but check the manufacturer's care instructions first because vinegar can damage some finishes. If the head looks pitted or worn, replacing it may make more sense.
The pressure feeding your shower can shift when water is used elsewhere. Many shower valves are designed to keep the temperature steady, so a big swing can mean the valve is worn. A plumber can check it.
In a tub-shower combination, one drain serves both. A shower-only stall has its own. Hair and soap collect the same way in either, and the checks are much the same.
