Glue the Santee and Vent Riser — Install the Drain Stub-Out
Part of project
How to Rough-In Plumbing for a Bathroom Vanity · Step 4 of 8
In this video
Apply PVC primer to the outside of the pipe ends and the inside of the santee fitting sockets. Follow this by applying PVC cement to the same surfaces. Firmly push the santee onto the pipe sections, ensuring the side opening is oriented correctly to accept the P-trap. Then, assemble and glue the riser for the auto-vent. If necessary, use 90-degree elbows and short pieces of pipe to create an offset to position the vent in an optimal, high location within the cabinet, away from obstructions.
Goal: Install the Drain and Vent Connection
- Work in a well-ventilated area and avoid inhaling fumes from the primer and cement.
Used in this video
- Santee Fitting — Creating the T-junction in the drain line.
- PVC Pipe (Pipe Material Type: PVC) — Creating the vent riser and offset pieces.
- PVC 90-Degree Elbows (Fitting Type: Elbow, Size/Dimensions: 1 1/2' DWV) · optional — Creating an offset for the vent riser if a straight path is obstructed.
- Tape Measure — Measuring pipe lengths for the vent riser and offset.
671K subscribers
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.
Glue the Santee and Vent Riser — Install the Drain Stub-Out
Part of project
How to Rough-In Plumbing for a Bathroom Vanity · Step 4 of 8
In this video
Apply PVC primer to the outside of the pipe ends and the inside of the santee fitting sockets. Follow this by applying PVC cement to the same surfaces. Firmly push the santee onto the pipe sections, ensuring the side opening is oriented correctly to accept the P-trap. Then, assemble and glue the riser for the auto-vent. If necessary, use 90-degree elbows and short pieces of pipe to create an offset to position the vent in an optimal, high location within the cabinet, away from obstructions.
Goal: Install the Drain and Vent Connection
- Work in a well-ventilated area and avoid inhaling fumes from the primer and cement.
Used in this video
- Santee Fitting — Creating the T-junction in the drain line.
- PVC Pipe (Pipe Material Type: PVC) — Creating the vent riser and offset pieces.
- PVC 90-Degree Elbows (Fitting Type: Elbow, Size/Dimensions: 1 1/2' DWV) · optional — Creating an offset for the vent riser if a straight path is obstructed.
- Tape Measure — Measuring pipe lengths for the vent riser and offset.
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.