How to Fix a Leaking Kitchen Side Sprayer

A leaking kitchen side sprayer can be a frustrating and wasteful problem. A leak can occur for various reasons, such as a worn-out O-ring, a loose connection, or a damaged hose. Fortunately, fixing a leaking side sprayer is a manageable task that can be done with some basic tools and a little patience. 

A full side sprayer replacement may be needed, if the specific broken or damaged component can’t be replaced.

Before getting into the steps, here are the tools and materials you'll need for this project:

Tools & Materials

Step 1: Identify the Source of the Leak

Before you can fix a leaking side sprayer, you need to determine where the leak is coming from. Here’s how to thoroughly inspect and identify the source of the leak:

Sprayer Head: The sprayer head is a frequent source of leaks. Look for any visible cracks, loose components, or worn-out seals. The sprayer head might be the culprit if water leaks from the nozzle or seams. Gently move the spray head around to see if the leak changes or stops, which can indicate a loose or damaged component.

Faucet Diverter: A faucet diverter is an internal component in the main faucet that directs water flow between the faucet and the side sprayer. When this diverter malfunctions or wears out, it can cause water to leak from the side sprayer even when the spray head lever has not been depressed. This usually results from mineral deposits, worn gaskets, or internal damage within the diverter valve, which compromises its ability to properly seal and channel water. Replacement of this part is possible to do on your own without professional help and is an affordable fix. 

Hose: The hose connecting the sprayer to the faucet can develop leaks due to wear and tear or damage. Inspect the entire length of the hose for any signs of cracks, kinks, or holes. Run your hand along the length of the hose while the water is running. Inspect the hose for any visible damage, such as cracks or holes.

Check out our kitchen spray hoses if you need a replacement.

Connection Points: Leaks often occur at the connection points where the hose attaches to the faucet or the spray head. Check these areas for loose fittings or deteriorated seals. Look for any water pooling around these areas, which can indicate a loose connection or a worn-out seal. Tighten the connections gently by hand to see if this stops the leak.

Step 2: Turn Off the Water Supply

This step is to help prevent water from flowing and causing further leaks or potential flooding while you work on the repair. Here’s how to safely turn off the water supply and prepare for the repair:

Locate the Shut-Off Valves

- Most kitchen sinks have two shut-off valves located under the sink, typically found at the back of the cabinet. These valves control the hot and cold water supplies to the faucet and the side sprayer.

- If your kitchen does not have individual shut-off valves under the sink, turn off the main water supply for your home. The main shut-off valve is usually located near the water meter or where the main water line enters your house.

Step 3: Disconnect the Sprayer Hose from the Head

With the water supply turned off, the next step is to disconnect the sprayer hose from the faucet. Here’s how to safely and efficiently disconnect the spray hose:

Locate the Connection Point

- The sprayer hose is usually connected to a tee connector on the faucet, which directs water to the sprayer when the trigger is pressed.

- The connection point is typically under the sink, where the hose meets the tee or the main faucet body.

Use the Right Tools

- You will need an adjustable wrench or a pair of pliers to loosen the connection. Be sure you have the right size tool to avoid damaging the fittings.

- If the connection is too tight, a bit of penetrating oil can help loosen it. Apply the oil and wait a few minutes before trying again.

Step 4: Replace the Source of the Leak

To Replace Sprayer Head or Hose

Replacing the sprayer head or hose is one of the less involved fixes. After the water supply is turned off, simply unthread the head or hose, and install a new and compatible replacement.

To Replace Faucet Diverter

To replace the faucet diverter, consult our Installation Guides playlist on our YouTube channel. However, most diverter replacements involve removing the faucet spout, and removing the old diverter.

How to Replace Faucet Diverters and Cartridges

To Replace O-Ring

The O-ring is a small but helpful component in preventing leaks in your kitchen faucet side sprayer. O-rings are circular rubber seals that sit in grooves around the sprayer’s connections, creating a watertight seal between different components. They prevent water from leaking out at the joints and connections by ensuring a snug fit. Over time, O-rings can degrade due to constant use, exposure to water, and fluctuations in temperature. Inspecting and replacing the O-ring is a straightforward process that can often resolve the leak. Here’s how to do it:

Locate & Remove the O-Ring

- The O-ring is typically located at the base of the spray head or where the hose connects to the faucet. In some models, there may be multiple O-rings along the hose or within the sprayer assembly. Carefully remove the old O-ring using a small flathead screwdriver or a dental pick. Be gentle to avoid scratching or damaging the surrounding metal or plastic components.

Choose the Right Replacement

- O-rings come in various sizes and thicknesses. If you’re unsure about the size, refer to the faucet’s manual or manufacturer’s website for specifications.

Install the New O-Ring

- Before installing the new O-ring, apply a small amount of plumber’s grease to it. This helps the O-ring seat properly and provides a better seal. Carefully place the new O-ring into the groove. Make sure it sits evenly and isn’t twisted or pinched.

Reassemble the Components

- Reattach the spray head or hose connection, making sure the new O-ring remains in place.

- Tighten the fittings by hand initially, then use an adjustable wrench to secure them. Be careful not to overtighten, as this can damage the O-ring or the fittings.

Step 5: Reassemble the Sprayer

After inspecting, replacing any damaged parts, and tightening all connections, the next step is to reassemble the kitchen side spray. Here’s how to carefully reassemble your sprayer system:

Reconnect the Sprayer Hose to the Faucet

- Start with reattaching the sprayer hose to the diverter or the main faucet body. Hand-tighten the fitting by turning it clockwise until it is snug. Use an adjustable wrench to give it a final turn to ensure it is secure but avoid over-tightening.

Reattach the Sprayer Head

- If you had to remove the spray head, reattach it to the end of the hose. Make sure the O-ring is properly seated before screwing on the spray head.