How to Fix a Kitchen Sink Sprayer in Easy Steps (2026)

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A side sprayer is one of the most useful things on a kitchen sink, until it starts dripping under the cabinet, spitting a weak stream or refusing to shut off. The good news is that almost every sprayer problem comes down to three parts: the head, the hose and the diverter. Here is how I find which one is at fault and fix it.

Quick answer

To fix a kitchen sink sprayer, first find the faulty part: a leak at the base points to the hose or its connection, weak spray points to a clogged head or a bad diverter, and a sprayer that won't stop points to a stuck valve in the head. Most repairs only need a wrench, pliers, some vinegar and sometimes a new head, hose or diverter.

Key takeaways

Test before you buy parts: removing the sprayer head and running the faucet tells you if the head or the diverter is to blame.
Leaks under the sink usually come from the hose connection or a cracked crimp sleeve, not from the faucet itself.
Weak spray is often just scale: soak the head in vinegar before you replace anything.
Always shut off the water under the sink before you open the faucet or disconnect the hose.

How a Kitchen Sink Sprayer Works

A side sprayer is fed by a hose that connects to the bottom of the faucet body, under the sink. Inside the faucet sits a small valve called the diverter. When the sprayer is idle, the diverter lets water flow out of the main spout.

When you squeeze the trigger on the sprayer head, pressure in the hose drops. The diverter reacts to that change and sends the water to the hose instead of the spout. Let go of the trigger, and the diverter switches back.

That is why the diverter needs good water pressure to work. If scale, debris or a worn seal slows it down, the sprayer gets weak or the water keeps coming out of the spout while you spray.

Find the Problem First

In my experience as a plumber, most people replace the whole sprayer when only one small part is at fault. Spend five minutes on this table before you buy anything.

Symptom	Likely cause	What to do
Water under the sink when you spray	Loose hose connection, worn washer or cracked crimp sleeve	Tighten or reseal the connection, replace the hose and head if the crimp leaks
Weak or uneven spray	Scale in the head, kinked hose or a sticky diverter	Clean the head, straighten the hose, then check the diverter
Water still comes out of the spout while spraying	Worn or clogged diverter	Clean or replace the diverter
Sprayer won't shut off	Stuck valve button in the head	Free the button or replace the head
Hose won't pull out or return	Hose or weight caught under the sink	Reposition the weight and reroute the hose

Is It the Head or the Diverter?

Turn off the water, unscrew the sprayer head from the hose and hold the open end of the hose over the sink. Turn the water back on and open the faucet. If a strong stream comes out of the bare hose, the head is clogged or faulty. If the flow from the hose is weak, the diverter is the problem.

Tools and Materials You Need

Adjustable wrench
Tongue-and-groove pliers
Phillips and flat-head screwdrivers
White vinegar and a small bowl
Old toothbrush
Clean rags
Flashlight
Penetrating oil
Replacement parts if needed: sprayer head, hose or diverter matching your faucet brand

Safety first

Close the hot and cold supply valves under the sink (turn them clockwise), then open the faucet to release the pressure left in the lines. Put a towel in the cabinet and a rag in the sink drain so small screws and parts can't get lost.

How to Fix a Sprayer Leaking at the Bottom

A leak at the base of the sprayer or under the sink usually shows up only while you spray, because that is when the hose is under pressure. Here is how I track it down.

Dry everything and look
Wipe the hose, the connection under the faucet and the base of the sprayer dry. Spray into the sink while a helper watches under the cabinet with a flashlight, and note exactly where the first drop appears.
Check the slide nut and the crimp sleeve
If water leaks under the slide nut at the sprayer base, unscrew the spray head and slide the nut down. Turn the water on and watch the crimp sleeve, the metal ring that holds the hose to its fitting. If the crimp itself leaks, it can't be repaired: replace the hose and head together.
Tighten or reseal the hose connection
If the leak comes from where the hose meets the faucet, snug the nut with a wrench. If it still drips, disconnect it, check the washer or O-ring for cracks and replace it.
Inspect the hose along its length
Run your hand along the hose. A bulge, a split or a worn spot where it rubs on the cabinet means the hose has to be replaced.

How to Fix a Sprayer That Won't Spray

When the sprayer only dribbles, start with the easiest fix: the head. Many heads have a small screen or holes that clog with mineral scale, especially in hard water areas.

Remove the sprayer head
Shut off the water, then unscrew the head from the hose. Hold the hose with pliers wrapped in a rag so you don't crush it.
Soak it in vinegar
Put the head in a bowl of white vinegar and let it soak for a few hours, or overnight if the scale is heavy. Scrub the holes and the screen with an old toothbrush, then rinse.
Reinstall and test
Screw the head back on, open the supply valves and test. If the spray is still weak, move on to the diverter.

How to Clean or Replace the Diverter

If the faucet stopped working properly after you used the sprayer, or water keeps flowing from the spout while you spray, the diverter is stuck or worn. Where it sits depends on your faucet type. Check your faucet manual too, because designs vary between brands.

Two-Handle Faucet

Shut off the water
Turn the hot and cold supply valves clockwise, then open the faucet to make sure no water is coming through.
Remove the cap
Wrap a rag around the cap on the faucet body, usually behind or under the spout. Turn it counterclockwise with tongue-and-groove pliers and lift it off to expose the diverter.
Take out the diverter
Slip the tip of a butter knife or a flat screwdriver under the diverter cover and turn the diverter counterclockwise to release it from the faucet body.
Clean or replace it
Soak the diverter in vinegar and brush off any scale, or install a new one if the seals are worn or torn.
Reassemble and test
Put the diverter back, set the cap in place, cover it with a rag and tighten it with pliers. Open the supply valves counterclockwise and test both the spout and the sprayer.

Single-Handle Faucet

Shut off the water
Close both supply valves under the sink and open the faucet to drain the lines.
Remove the handle
Find the small set screw at the base of the handle and loosen it with a Phillips screwdriver or the right Allen key. Lift off the handle to reach the cap.
Remove the spout
Put a rag over the cap and unscrew it. Then lift the spout off the faucet body by rocking it gently back and forth while pulling up. The diverter now sits in front of you on the faucet body.
Pull out the diverter
Use a flat-head screwdriver to ease the diverter out of its opening. Clean it in vinegar, or replace it if it is worn.
Reinstall everything
Push the clean or new diverter back into the opening, put the spout back on, then the cap and the handle. Open the water and test.

The Kitchen Sink Sprayer Won't Turn Off

A sprayer that keeps spraying after you let go has a valve button stuck in the open position inside the head. Here is the quick fix I use.

Hold the sprayer in one hand. Slide the tip of a dinner knife under the trigger lever and press down on the valve button underneath. Do this with the water on: the water pressure helps push the valve closed.

If it keeps sticking, shut off the supply valves and put a drop of penetrating oil on the button, then work it a few times until it slides freely. If it still won't behave, unscrew the head from the hose with adjustable pliers and replace it.

How to Fix Low Water Pressure at the Kitchen Sink

Sometimes the sprayer is fine and the whole faucet is weak. Before you blame the sprayer, check these points in order.

Check if the problem is house-wide
Open another faucet in the house. If the pressure is low everywhere, the cause is in the supply: a faulty pressure pump, a partly closed main valve or an issue in the water lines. That is a job for a plumber or your water supplier.
Check the aerator first
Most faucets have an aerator, a small screen screwed onto the tip of the spout. Unscrew it and run the tap without it. If the flow becomes normal, the aerator is clogged: clean it in vinegar or replace it.
Look for a blockage in the faucet
If the aerator is clean and the flow is still weak, scale may be blocking the faucet parts. Take them apart and soak them overnight in vinegar to dissolve the hard water deposits that slow the flow.
Check the supply valves and hoses
Make sure both shutoff valves under the sink are fully open and that the supply lines and sprayer hose are not kinked behind the cabinet.

Common Mistakes to Avoid

Working with the water on: always close the supply valves and release the pressure first.
Crushing the hose with pliers: wrap the hose in a rag before you grip it.
Buying a universal sprayer for a branded faucet: the diverter and hose fittings are often brand specific.
Over-tightening plastic fittings: snug is enough, too much force cracks them.
Ignoring a small drip under the sink: it slowly ruins the cabinet floor.

FAQs

My sprayer hose won't pull out or retract smoothly. What should I do?

The hose or its weight is usually caught on the supply lines or the trap under the sink. Move the weight up or down the hose and reroute the hose so it hangs freely.

How does a sink sprayer work?

When you squeeze the sprayer trigger, pressure drops in the hose and a small valve called the diverter sends the water from the spout to the sprayer hose instead.

Why is my sink sprayer not working?

It is usually a clogged sprayer head or a faulty diverter. Remove the head and run the faucet: if the flow from the bare hose is weak, the diverter is the problem.

How do I get a stuck sprayer to turn off and switch back to the faucet?

Turn off the supply valves, put a drop of penetrating oil on the sprayer button and work it until it moves freely. If it still sticks, unscrew the head from the hose with pliers and replace it.

A faulty kitchen sink sprayer is rarely a reason to replace the whole faucet. Find the problem first, clean the head and the diverter, check the hose and its connection, and replace only the part that is worn. If your faucet is old and the parts are hard to find, it may be time for a new kitchen faucet with a side sprayer.