Install PEX Water Lines — Running New PEX Lines
Part of project
How to Replace Grey Polybutylene Pipe with PEX · Step 6 of 10
In this video
The presenter prepares for and installs the PEX water supply lines. Using a drill with a 5/8-inch auger bit, he drills two holes through the wooden bottom plate of the wall, one for the hot and one for the cold line, aligning them below the corresponding inlets on the outlet box. He feeds the red and blue PEX pipes up through the holes. For each line, he slides a 1/2-inch stainless steel crimp ring onto the pipe. He then pushes the end of the PEX pipe fully onto the brass barb fitting of the valve. He positions the crimp ring about 1/8 of an inch from the base of the fitting. Using a PEX crimping tool, he squeezes the handles until the tool fully closes, which compresses the ring and secures the pipe to the fitting, creating a permanent, leak-proof connection. He repeats the process for the second water line.
Goal: Connect the hot and cold PEX water lines to the outlet box valves
- Ensure the PEX pipe is fully seated on the barb fitting before crimping the ring.
- Position the crimp ring 1/8 to 1/4 inch from the end of the pipe to allow for proper compression without damaging the fitting.
Used in this video
- Cordless Drill (brand: Ridgid, Tool Type: Power Tools, Power Source: Battery) — Drilling holes for the PEX pipes.
- Auger Drill Bit (brand: Unbranded, Material: Metal, Size/Dimensions: 5/8 inch) — Drilling clean holes in the wood frame.
- PEX Crimping Tool (brand: Unbranded, Tool Type: Hand Tools, Power Source: Manual) — Securing crimp rings onto PEX pipes and fittings.
- Pliers (brand: Unbranded, Tool Type: Hand Tools, Power Source: Manual) · optional — Temporarily holding the crimp ring in place before using the crimping tool.
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FAQs
Given the 40-hour estimate, is a whole-house PEX repipe truly an 'intermediate' DIY project, or should I hire a professional?
While labeled intermediate, this project demands significant time, precision, and adherence to plumbing codes. It's suitable for experienced DIYers comfortable with tools and problem-solving, but if you're unsure about the complexity or time commitment, consulting a licensed plumber is advisable, especially for main supply connections and final inspections.
What are the most crucial safety precautions I must take when replacing polybutylene pipes with PEX?
Always shut off and thoroughly drain the main water supply before starting. Wear appropriate PPE, including eye protection, and ensure good ventilation if soldering is required for main tie-ins. Be cautious when cutting into existing lines to prevent accidental damage or uncontrolled water release, and always have a plan for containing potential leaks.
The project lists specific PEX tools like crimp tools and cutters. Are these absolutely essential, or are there budget-friendly alternatives?
Yes, specialized PEX tools such as a PEX pipe cutter and a crimp/clamp tool are essential for making reliable, leak-free connections. While there are different brands and price points, investing in quality PEX-specific tools is crucial for successful installation. Avoid using standard tools for PEX connections, as they can lead to costly leaks and system failures.
What are common mistakes DIYers make during PEX installation, particularly with crimp connections, and how can they be avoided?
Common mistakes include improper crimp ring placement, not fully deburring cut pipes, and over-tightening manifold connections. Always ensure the crimp ring is correctly positioned over the fitting's barb, deburr all pipe ends to prevent leaks, and follow manufacturer guidelines for manifold valve torque. Testing sections of the system as you go can help catch issues early.
Install PEX Water Lines — Running New PEX Lines
Part of project
How to Replace Grey Polybutylene Pipe with PEX · Step 6 of 10
In this video
The presenter prepares for and installs the PEX water supply lines. Using a drill with a 5/8-inch auger bit, he drills two holes through the wooden bottom plate of the wall, one for the hot and one for the cold line, aligning them below the corresponding inlets on the outlet box. He feeds the red and blue PEX pipes up through the holes. For each line, he slides a 1/2-inch stainless steel crimp ring onto the pipe. He then pushes the end of the PEX pipe fully onto the brass barb fitting of the valve. He positions the crimp ring about 1/8 of an inch from the base of the fitting. Using a PEX crimping tool, he squeezes the handles until the tool fully closes, which compresses the ring and secures the pipe to the fitting, creating a permanent, leak-proof connection. He repeats the process for the second water line.
Goal: Connect the hot and cold PEX water lines to the outlet box valves
- Ensure the PEX pipe is fully seated on the barb fitting before crimping the ring.
- Position the crimp ring 1/8 to 1/4 inch from the end of the pipe to allow for proper compression without damaging the fitting.
Used in this video
- Cordless Drill (brand: Ridgid, Tool Type: Power Tools, Power Source: Battery) — Drilling holes for the PEX pipes.
- Auger Drill Bit (brand: Unbranded, Material: Metal, Size/Dimensions: 5/8 inch) — Drilling clean holes in the wood frame.
- PEX Crimping Tool (brand: Unbranded, Tool Type: Hand Tools, Power Source: Manual) — Securing crimp rings onto PEX pipes and fittings.
- Pliers (brand: Unbranded, Tool Type: Hand Tools, Power Source: Manual) · optional — Temporarily holding the crimp ring in place before using the crimping tool.
Frequently Asked Questions
Given the 40-hour estimate, is a whole-house PEX repipe truly an 'intermediate' DIY project, or should I hire a professional?
While labeled intermediate, this project demands significant time, precision, and adherence to plumbing codes. It's suitable for experienced DIYers comfortable with tools and problem-solving, but if you're unsure about the complexity or time commitment, consulting a licensed plumber is advisable, especially for main supply connections and final inspections.
What are the most crucial safety precautions I must take when replacing polybutylene pipes with PEX?
Always shut off and thoroughly drain the main water supply before starting. Wear appropriate PPE, including eye protection, and ensure good ventilation if soldering is required for main tie-ins. Be cautious when cutting into existing lines to prevent accidental damage or uncontrolled water release, and always have a plan for containing potential leaks.
The project lists specific PEX tools like crimp tools and cutters. Are these absolutely essential, or are there budget-friendly alternatives?
Yes, specialized PEX tools such as a PEX pipe cutter and a crimp/clamp tool are essential for making reliable, leak-free connections. While there are different brands and price points, investing in quality PEX-specific tools is crucial for successful installation. Avoid using standard tools for PEX connections, as they can lead to costly leaks and system failures.
What are common mistakes DIYers make during PEX installation, particularly with crimp connections, and how can they be avoided?
Common mistakes include improper crimp ring placement, not fully deburring cut pipes, and over-tightening manifold connections. Always ensure the crimp ring is correctly positioned over the fitting's barb, deburr all pipe ends to prevent leaks, and follow manufacturer guidelines for manifold valve torque. Testing sections of the system as you go can help catch issues early.