Water coming out of the spray nozzle when the sink faucet is turned on is usually caused by a faulty diverter valve. The diverter valve is responsible for redirecting water flow from the faucet spout to the spray nozzle. As a professional spray nozzles manufacturer, I will share some of the common reasons why water may come out of the spray nozzle sink incorrectly.

Why Does Water Come Out of the Spray Nozzle Sink?
Clogged or Damaged Diverter Valve
The most common reason you may experience water coming out of the spray nozzle is a clogged or damaged diverter valve. Mineral deposits from hard water can build up inside the valve over time and prevent it from sealing properly.
Symptoms of a faulty diverter valve include:
- Water spraying weakly from the nozzle when triggered
- Water pulsating rapidly out of the nozzle
- Water leaking from the faucet spout when using the spray nozzle
Replacing the old diverter valve will typically resolve these spray nozzle water flow issues.
Failing Spray Nozzle Head
If the diverter valve checks out, the issue could be with the spray nozzle head itself. The spring mechanism inside the spray head that controls water flow could be worn out or blocked.
To test, remove the nozzle head and turn on the faucet. If water flows properly from the hose alone, it points to a failing nozzle head. Simply replacing this inexpensive part should fix the problem.
Kinked Under-Sink Connector Hose
Another possibility is a kinked or bent connector hose under the sink leading up to the spray nozzle. If the flexible metal hose gets a tight kink, it can obstruct normal water flow.
Carefully inspect the hose for any sharp bends. Adjust or replace the hose if necessary to restore proper operation.
Tips for Preventing Spray Nozzle Issues
Here are some handy tips to help prevent spray nozzle problems from occurring in the first place:
- Periodically clean nozzle head with vinegar to dissolve mineral buildup
- Avoid pulling sharply on nozzle spray head to prevent hose kinking
- Consider installing a whole-house water softener system
- Replace old connector hoses when redoing kitchen plumbing
Following these preventative maintenance steps will help ensure your sink’s spray nozzle functions reliably for years to come. Acting quickly when spray nozzle issues do pop up will also minimize water damage and unnecessary headaches.
