Mount Valve and Connect PEX Supply Lines — Install Supply Stub-Outs and Shutoff Valves
Part of project
How to Rough-In Plumbing for a Bathroom Vanity · Step 6 of 8
In this video
Align the valve with the center of the tub drain and mount it to the wood blocking using galvanized screws through the provided mounting holes. Double-check that it is level and at the correct depth. Cut the PEX tubing for the hot and cold supply lines to length. Slide a crimp ring onto each PEX pipe. Push the pipe fully onto the corresponding adapter on the valve (hot to the left, cold to the right). Position the crimp ring 1/8 to 1/4 inch from the end of the pipe and use a PEX crimping tool to secure the ring, creating a watertight connection.
Goal: Plumbing Pipes Installation
Used in this video
- PEX Crimping Tool (Tool Type: Plumbing Tools) — Securing the crimp rings over the PEX tubing and fittings.
- PEX Cutter (Tool Type: Plumbing Tools) — Making clean, straight cuts on the PEX tubing.
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FAQs
How difficult is it to rough-in plumbing for a vanity, and how long should I expect it to take?
This project is rated "intermediate" because it requires precise measurements, proper pipe joining techniques, and an understanding of plumbing codes. For a DIYer with some experience, expect 8-16 hours of work, depending on existing wall access and any unforeseen issues. Costs can range from $150-$300 for materials, assuming you already own basic tools.
What are the most crucial safety precautions I should take when roughing-in plumbing?
Always shut off the main water supply before cutting into existing lines to prevent flooding. Wear appropriate personal protective equipment (PPE) like safety glasses, gloves, and hearing protection, especially when using power tools like drills and hole saws. Be mindful of electrical wires inside walls when drilling or cutting.
The guide mentions PEX for supply lines; can I use copper or CPVC instead, and what are the pros of PEX?
While copper and CPVC are alternatives, PEX is often preferred for DIY projects due to its flexibility, ease of installation (fewer fittings, no soldering), and resistance to freezing. However, PEX requires specific crimp or expansion tools. If you're comfortable with soldering, copper is a durable choice, and CPVC offers a rigid, solvent-weld option.
What are the most common mistakes DIYers make when roughing-in a vanity's drain and supply lines?
A common mistake is incorrect drain slope, leading to clogs – ensure a 1/4 inch per foot slope for DWV lines. Another error is misplacing supply stub-outs, making fixture installation difficult; always double-check vanity and sink specifications. Also, failing to properly prime and cement PVC joints can cause leaks.
Mount Valve and Connect PEX Supply Lines — Install Supply Stub-Outs and Shutoff Valves
Part of project
How to Rough-In Plumbing for a Bathroom Vanity · Step 6 of 8
In this video
Align the valve with the center of the tub drain and mount it to the wood blocking using galvanized screws through the provided mounting holes. Double-check that it is level and at the correct depth. Cut the PEX tubing for the hot and cold supply lines to length. Slide a crimp ring onto each PEX pipe. Push the pipe fully onto the corresponding adapter on the valve (hot to the left, cold to the right). Position the crimp ring 1/8 to 1/4 inch from the end of the pipe and use a PEX crimping tool to secure the ring, creating a watertight connection.
Goal: Plumbing Pipes Installation
Used in this video
- PEX Crimping Tool (Tool Type: Plumbing Tools) — Securing the crimp rings over the PEX tubing and fittings.
- PEX Cutter (Tool Type: Plumbing Tools) — Making clean, straight cuts on the PEX tubing.
Frequently Asked Questions
How difficult is it to rough-in plumbing for a vanity, and how long should I expect it to take?
This project is rated "intermediate" because it requires precise measurements, proper pipe joining techniques, and an understanding of plumbing codes. For a DIYer with some experience, expect 8-16 hours of work, depending on existing wall access and any unforeseen issues. Costs can range from $150-$300 for materials, assuming you already own basic tools.
What are the most crucial safety precautions I should take when roughing-in plumbing?
Always shut off the main water supply before cutting into existing lines to prevent flooding. Wear appropriate personal protective equipment (PPE) like safety glasses, gloves, and hearing protection, especially when using power tools like drills and hole saws. Be mindful of electrical wires inside walls when drilling or cutting.
The guide mentions PEX for supply lines; can I use copper or CPVC instead, and what are the pros of PEX?
While copper and CPVC are alternatives, PEX is often preferred for DIY projects due to its flexibility, ease of installation (fewer fittings, no soldering), and resistance to freezing. However, PEX requires specific crimp or expansion tools. If you're comfortable with soldering, copper is a durable choice, and CPVC offers a rigid, solvent-weld option.
What are the most common mistakes DIYers make when roughing-in a vanity's drain and supply lines?
A common mistake is incorrect drain slope, leading to clogs – ensure a 1/4 inch per foot slope for DWV lines. Another error is misplacing supply stub-outs, making fixture installation difficult; always double-check vanity and sink specifications. Also, failing to properly prime and cement PVC joints can cause leaks.