Install and Secure New Faucet — Install the New Faucet, Drain, and P-trap
Part of project
Replace a Bathroom Faucet: Easy Guide · Step 4 of 5
In this video
Prepare the new faucet for installation. Place the clear plastic gasket over the faucet's hoses and seat it firmly against the base. Carefully feed the hot and cold water lines and the threaded mounting shank through the hole in the countertop. Position the faucet so it is centered and facing the correct direction. From underneath, slide the large washer and then the mounting nut over the hoses and onto the threaded shank. Hand-tighten the nut to hold the faucet in place, then use the included tool or a basin wrench to fully tighten it, securing the faucet to the sink deck.
Goal: Mount and secure the new faucet onto the sink.
- Have a helper hold the faucet in the correct position from above while you tighten it from below to prevent it from shifting.
Used in this video
- Faucet Installation Tool (brand: Moen) · optional — Tightening the faucet mounting nut.
1.3M subscribers
FAQs
Do I really need specialized tools like a basin wrench to replace my bathroom faucet?
While an adjustable wrench can sometimes work, a basin wrench (like the Husky or TEKTON models mentioned) is highly recommended. It's specifically designed to reach and loosen/tighten mounting nuts in the tight, awkward spaces under your sink, making the job significantly easier and less frustrating for beginners.
What should I do if the water shut-off valves under my sink are stuck or won't turn off completely?
If the under-sink valves are stuck or faulty, you'll need to locate and turn off the main water supply to your entire house before proceeding. If you're uncomfortable doing this or if the main valve is also problematic, it's best to call a professional plumber to avoid potential water damage.
How can I ensure I don't have any leaks after installing my new faucet and drain?
To prevent leaks, make sure all threaded connections are hand-tightened first, then snugged with a wrench, avoiding overtightening which can crack parts. Always use plumber's tape (Teflon tape) on threaded supply line connections and plumber's putty or the provided gasket for the drain assembly to create a watertight seal.
Is it okay to reuse my old water supply lines with the new faucet, or should I replace them?
It is strongly recommended to replace old water supply lines with new ones when installing a new faucet. Old lines can degrade, become brittle, or leak after being disturbed, even if they look fine. Many new faucets come with fresh supply lines, or they are inexpensive to purchase separately.
Install and Secure New Faucet — Install the New Faucet, Drain, and P-trap
Part of project
Replace a Bathroom Faucet: Easy Guide · Step 4 of 5
In this video
Prepare the new faucet for installation. Place the clear plastic gasket over the faucet's hoses and seat it firmly against the base. Carefully feed the hot and cold water lines and the threaded mounting shank through the hole in the countertop. Position the faucet so it is centered and facing the correct direction. From underneath, slide the large washer and then the mounting nut over the hoses and onto the threaded shank. Hand-tighten the nut to hold the faucet in place, then use the included tool or a basin wrench to fully tighten it, securing the faucet to the sink deck.
Goal: Mount and secure the new faucet onto the sink.
- Have a helper hold the faucet in the correct position from above while you tighten it from below to prevent it from shifting.
Used in this video
- Faucet Installation Tool (brand: Moen) · optional — Tightening the faucet mounting nut.
Frequently Asked Questions
Do I really need specialized tools like a basin wrench to replace my bathroom faucet?
While an adjustable wrench can sometimes work, a basin wrench (like the Husky or TEKTON models mentioned) is highly recommended. It's specifically designed to reach and loosen/tighten mounting nuts in the tight, awkward spaces under your sink, making the job significantly easier and less frustrating for beginners.
What should I do if the water shut-off valves under my sink are stuck or won't turn off completely?
If the under-sink valves are stuck or faulty, you'll need to locate and turn off the main water supply to your entire house before proceeding. If you're uncomfortable doing this or if the main valve is also problematic, it's best to call a professional plumber to avoid potential water damage.
How can I ensure I don't have any leaks after installing my new faucet and drain?
To prevent leaks, make sure all threaded connections are hand-tightened first, then snugged with a wrench, avoiding overtightening which can crack parts. Always use plumber's tape (Teflon tape) on threaded supply line connections and plumber's putty or the provided gasket for the drain assembly to create a watertight seal.
Is it okay to reuse my old water supply lines with the new faucet, or should I replace them?
It is strongly recommended to replace old water supply lines with new ones when installing a new faucet. Old lines can degrade, become brittle, or leak after being disturbed, even if they look fine. Many new faucets come with fresh supply lines, or they are inexpensive to purchase separately.