Install New PEX Plumbing — Connect Pipes to Box Valves
Part of project
How to Install a Washing Machine Outlet Box · Step 7 of 8
In this video
With the old, damaged pipes removed, install the new PEX tubing. Start by attaching a threaded PEX adapter to the existing galvanized pipe. Measure and cut the PEX tubing to the required lengths. Assemble the new lines using PEX fittings, such as T-fittings and elbows, to match the original plumbing configuration. Slide a PEX crimp ring over the pipe, insert the fitting, position the ring correctly, and use a PEX crimping tool to secure each connection.
Goal: Replace old plumbing with new PEX tubing
- Ensure the PEX crimp ring is positioned 1/8 to 1/4 inch from the end of the pipe before crimping for a secure seal.
Used in this video
- PEX Crimping Tool (Tool Type: Crimping Tool, Crimping Tool Size: 3/4 inch) — Securing the PEX crimp rings over the fittings to create a watertight seal.
- PEX Cutter (Tool Type: Pipe Cutter, Material Compatibility: PEX) — Making clean, straight cuts on the PEX tubing.
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FAQs
Is the estimated 8-hour completion time realistic for an intermediate DIYer, or should I budget more time if I'm less experienced?
The 8-hour estimate is for an intermediate DIYer with some plumbing and carpentry experience. If you're a beginner, budget 1.5 to 2 times that, as learning new skills like pipe cutting, solvent welding, and working in tight spaces will add significant time. Always prioritize careful work over speed to avoid costly mistakes.
What are the most critical safety precautions I should take, especially when cutting into existing walls and dealing with water lines?
Before cutting into any wall, always use a stud finder with AC detection to locate studs, pipes, and electrical wires to avoid accidental damage. Turn off the main water supply before making any connections to existing lines. Have buckets and towels ready, and be prepared to shut off water immediately if a leak occurs during testing.
The project lists PEX crimp tools; can I use PEX expansion tools or SharkBite fittings instead, and what are the pros and cons?
Yes, PEX expansion tools like Uponor/ProPEX or SharkBite push-to-connect fittings are viable alternatives. Expansion tools require specific PEX-A tubing and offer a strong, reliable connection. SharkBite fittings are quicker and require no special tools beyond a cutter, but they are significantly more expensive per fitting and less permanent in nature.
What's the best way to ensure all my plumbing connections are leak-free, especially for the drain and supply lines?
For PVC drain lines, ensure you apply primer and cement generously and twist the pipe firmly into the fitting for a secure bond. For PEX supply lines, double-check that crimp rings are properly compressed or SharkBite fittings are fully seated. After all connections, slowly turn on the main water supply and thoroughly inspect every joint for drips or seeping water before closing the wall.
TranscriptHide
Auto-generated transcript. May contain errors.
Install New PEX Plumbing — Connect Pipes to Box Valves
Part of project
How to Install a Washing Machine Outlet Box · Step 7 of 8
In this video
With the old, damaged pipes removed, install the new PEX tubing. Start by attaching a threaded PEX adapter to the existing galvanized pipe. Measure and cut the PEX tubing to the required lengths. Assemble the new lines using PEX fittings, such as T-fittings and elbows, to match the original plumbing configuration. Slide a PEX crimp ring over the pipe, insert the fitting, position the ring correctly, and use a PEX crimping tool to secure each connection.
Goal: Replace old plumbing with new PEX tubing
- Ensure the PEX crimp ring is positioned 1/8 to 1/4 inch from the end of the pipe before crimping for a secure seal.
Used in this video
- PEX Crimping Tool (Tool Type: Crimping Tool, Crimping Tool Size: 3/4 inch) — Securing the PEX crimp rings over the fittings to create a watertight seal.
- PEX Cutter (Tool Type: Pipe Cutter, Material Compatibility: PEX) — Making clean, straight cuts on the PEX tubing.
Frequently Asked Questions
Is the estimated 8-hour completion time realistic for an intermediate DIYer, or should I budget more time if I'm less experienced?
The 8-hour estimate is for an intermediate DIYer with some plumbing and carpentry experience. If you're a beginner, budget 1.5 to 2 times that, as learning new skills like pipe cutting, solvent welding, and working in tight spaces will add significant time. Always prioritize careful work over speed to avoid costly mistakes.
What are the most critical safety precautions I should take, especially when cutting into existing walls and dealing with water lines?
Before cutting into any wall, always use a stud finder with AC detection to locate studs, pipes, and electrical wires to avoid accidental damage. Turn off the main water supply before making any connections to existing lines. Have buckets and towels ready, and be prepared to shut off water immediately if a leak occurs during testing.
The project lists PEX crimp tools; can I use PEX expansion tools or SharkBite fittings instead, and what are the pros and cons?
Yes, PEX expansion tools like Uponor/ProPEX or SharkBite push-to-connect fittings are viable alternatives. Expansion tools require specific PEX-A tubing and offer a strong, reliable connection. SharkBite fittings are quicker and require no special tools beyond a cutter, but they are significantly more expensive per fitting and less permanent in nature.
What's the best way to ensure all my plumbing connections are leak-free, especially for the drain and supply lines?
For PVC drain lines, ensure you apply primer and cement generously and twist the pipe firmly into the fitting for a secure bond. For PEX supply lines, double-check that crimp rings are properly compressed or SharkBite fittings are fully seated. After all connections, slowly turn on the main water supply and thoroughly inspect every joint for drips or seeping water before closing the wall.
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