Having a leaking kitchen faucet can be a real headache, especially when it's coming from under your sink. Not only does it create a mess, but it can also cause damage to your cabinets and floors. One of the most common types of kitchen faucets that experience this issue is the Delta pull out faucet. In this article, we'll discuss the top 10 causes of a Delta pull out kitchen faucet leaking under sink and how to fix them.Delta Pull Out Kitchen Faucet Leaking Under Sink: A Common and Troublesome Problem
The O-rings in your Delta pull out faucet are responsible for creating a watertight seal to prevent leaks. Over time, these small rubber rings can become worn out and start to leak. This is a common cause of a leaking faucet, and it's an easy fix. You can purchase replacement O-rings from any hardware store and replace them yourself by following the manufacturer's instructions.1. Worn Out O-Rings
The cartridge in your Delta pull out faucet is the part that controls the flow of water. If it becomes damaged or worn out, it can cause leaks. You may notice water leaking from the handle or the base of the faucet. Replacing the cartridge is a straightforward fix, and you can purchase a new one from your local hardware store.2. Damaged Cartridge
Over time, the connections between your faucet and the water supply lines can become loose, causing leaks. This is a common issue with pull out faucets, as the hose can put pressure on the connections, causing them to loosen. Simply tightening the connections can solve this problem.3. Loose Connections
If your Delta pull out faucet is leaking from the base, it could be due to a cracked water supply line. This can happen over time due to wear and tear, or it can be caused by the faucet being installed too tightly. If you notice a crack in the supply line, you will need to replace it to stop the leak.4. Cracked Water Supply Lines
The valve seat in your Delta pull out faucet is the part that connects the faucet to the spout. Over time, this can become corroded, leading to leaks. You can clean the valve seat with a wire brush or replace it entirely if needed.5. Corroded Valve Seat
If you have hard water, mineral buildup can occur in your faucet, causing leaks. The minerals can clog the small openings and cause the water to back up and leak. Regularly cleaning your faucet with a mixture of vinegar and water can help prevent this issue.6. Mineral Buildup
If your Delta pull out faucet has a sprayer hose, this could be the source of the leak. Over time, the hose can become damaged, causing water to leak. You may need to replace the sprayer hose to stop the leak.7. Faulty Sprayer Hose
The mounting nut on your Delta pull out faucet can become loose over time, causing leaks. This is a simple fix, and you can tighten the nut with a wrench to stop the leak.8. Loose Mounting Nut
If your faucet has a water connector that is cracked or damaged, it can cause leaks. You will need to replace the water connector to solve this issue.9. Cracked Water Connector