Installing Pex To Bathroom Sink

Installing PEX to a Bathroom Sink

Installing PEX tubing to a bathroom sink is a relatively straightforward plumbing project that can be tackled by homeowners with basic DIY skills. PEX tubing, known for its flexibility, durability, and ease of installation, has become increasingly popular for plumbing applications, including bathroom sink plumbing. This article outlines the steps involved in installing PEX tubing to a bathroom sink, providing a detailed guide for those interested in undertaking this project.

Preparing for Installation

Before beginning the installation process, it is crucial to gather the necessary materials and tools. This includes PEX tubing, PEX fittings, a PEX cutter, a tubing expander tool, a pipe wrench, a basin wrench, Teflon tape, and a drain stopper. Additionally, ensure that all water supply lines are turned off to the bathroom sink. Once the water is shut off, it is advisable to drain the existing water in the pipes to prevent any spills during the installation.

Remove the existing supply lines to the bathroom sink using a basin wrench. The old supply lines may be made of copper, galvanized steel, or other materials. Once the supply lines are removed, inspect the connections for any signs of leaks or corrosion. If necessary, clean the connections with a wire brush or sandpaper to ensure a secure connection.

Connecting PEX Tubing to the Sink

After preparing the connections, cut the PEX tubing to the desired length using a PEX cutter. Make sure the cuts are clean and perpendicular to the tubing. Apply a thin layer of Teflon tape to the threaded portion of the PEX fitting to ensure a leak-proof seal.

Insert the PEX tubing into the PEX fitting and use a tubing expander tool to expand the tubing. The expander tool creates a tight fit between the tubing and the fitting, ensuring a secure connection. Ensure that the tubing is fully expanded and makes a solid connection with the fitting.

Connect the PEX tubing to the shut-off valve or stop valve attached to the sink. This connection may require the use of a pipe wrench to tighten the nut securely. Again, ensure that the connection is tight and leak-proof. Once the connection is made, turn the water supply back on and carefully check for any leaks.

Connecting PEX Tubing to the Water Supply

The next step involves connecting the PEX tubing to the main water supply line. This typically involves using a PEX crimp fitting, which creates a secure connection through a crimping process. The connection point depends on the location of the water supply and the specific plumbing setup.

Before connecting the PEX tubing to the water supply, ensure that the supply line is clean and free from debris. If necessary, use a pipe brush or other cleaning tools to ensure a proper connection. Apply a thin layer of Teflon tape to the threads of the crimp fitting to prevent leaks.

Connect the PEX tubing to the crimp fitting and use a crimp tool to secure the connection. The crimp tool compresses the fitting around the tubing, creating a tight and secure seal. Ensure that the crimp tool is properly aligned and that the crimp is complete.

After connecting the PEX tubing, carefully inspect the connection for any signs of leaks or imperfections. Turn the water supply back on slowly and check for leaks. If any leaks are present, try tightening the connection further or reapplying Teflon tape.

Testing for Leaks

Once all the connections are made, it is crucial to test the entire installation for leaks. Turn the water supply back on and check all connections for leaks. Pay close attention to the connections between the PEX tubing and the fittings, as well as the connection to the sink and the water supply. Ensure that all connections are tight and leak-proof.

Allow the water to run for several minutes to ensure that all the air is purged from the system. Check for any dripping or signs of water seepage. If any leaks are detected, investigate the affected connection and try to tighten or re-apply Teflon tape.

After successfully testing the entire installation, connect the water supply to the bathroom sink and check for proper water flow and pressure. If the water flow is weak or there are any issues with pressure, review the connections and ensure that all connections are tight and fully open.