Run Drops and Connect Fixtures — Run Water Supply Lines
Part of project
How to Rough-In Plumbing for a Basement Bathroom · Step 6 of 7
In this video
Working in the attic, run separate hot and cold PEX lines from the main distribution point to the wall cavity above each fixture. Drop the lines down through the wall to the access panels. Use a PEX crimping tool and appropriate fittings to connect the new lines to the water heater, sinks, and tub/shower valves, effectively bypassing the old slab plumbing.
Goal: Connect new pipes to all fixtures
- Working in an attic can be extremely hot. Ensure proper ventilation, stay hydrated, and take frequent breaks.
Used in this video
- PEX Crimping Tool (brand: Not specified, Tool Type: Plumbing Tools, Power Source: Manual, Material: Metal, Size/Weight: Medium, Purpose: Plumbing) — Securing fittings onto the PEX pipes to create watertight connections.
- Ladder (brand: Not specified, Tool Type: Hand tools, Power Source: Manual, Material: Metal, Fiberglass, Size/Weight: Large, Purpose: Fastening) — Accessing the attic and working on higher-up connections.
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FAQs
How difficult is roughing in basement bathroom plumbing for a DIYer, and how long does it typically take?
This project is rated intermediate due to the need for precise measurements, concrete work, and understanding plumbing codes. For an experienced DIYer, it can take 3-5 full days of work, not including permit acquisition and inspection wait times. Beginners should consider professional help for critical steps like concrete cutting and main line tie-ins.
What permits do I need, and how do I ensure my rough-in plumbing passes inspection?
You will almost certainly need a plumbing permit and possibly a building permit. Contact your local building department early in the planning phase to understand all requirements, necessary inspections (like the rough-in inspection), and specific code regulations for pipe sizing, slope, and venting to avoid costly rework.
What's the best way to break up the concrete floor, and what safety precautions should I take?
A demolition hammer or electric jackhammer is highly recommended for efficiency, which can often be rented. Wear heavy-duty work gloves, steel-toed boots, eye protection, hearing protection, and a dust mask to protect against concrete dust and flying debris. Be mindful of existing utility lines marked during the planning phase.
What are the most common mistakes when installing the underground DWV pipes, and how can I avoid them?
Common mistakes include incorrect pipe slope, inadequate solvent welding, and insufficient depth for drain lines. Ensure a consistent slope of at least 1/4 inch per foot for proper drainage, use proper primer and cement for strong, leak-free joints, and confirm all pipes are securely bedded in gravel to prevent shifting.
Run Drops and Connect Fixtures — Run Water Supply Lines
Part of project
How to Rough-In Plumbing for a Basement Bathroom · Step 6 of 7
In this video
Working in the attic, run separate hot and cold PEX lines from the main distribution point to the wall cavity above each fixture. Drop the lines down through the wall to the access panels. Use a PEX crimping tool and appropriate fittings to connect the new lines to the water heater, sinks, and tub/shower valves, effectively bypassing the old slab plumbing.
Goal: Connect new pipes to all fixtures
- Working in an attic can be extremely hot. Ensure proper ventilation, stay hydrated, and take frequent breaks.
Used in this video
- PEX Crimping Tool (brand: Not specified, Tool Type: Plumbing Tools, Power Source: Manual, Material: Metal, Size/Weight: Medium, Purpose: Plumbing) — Securing fittings onto the PEX pipes to create watertight connections.
- Ladder (brand: Not specified, Tool Type: Hand tools, Power Source: Manual, Material: Metal, Fiberglass, Size/Weight: Large, Purpose: Fastening) — Accessing the attic and working on higher-up connections.
Frequently Asked Questions
How difficult is roughing in basement bathroom plumbing for a DIYer, and how long does it typically take?
This project is rated intermediate due to the need for precise measurements, concrete work, and understanding plumbing codes. For an experienced DIYer, it can take 3-5 full days of work, not including permit acquisition and inspection wait times. Beginners should consider professional help for critical steps like concrete cutting and main line tie-ins.
What permits do I need, and how do I ensure my rough-in plumbing passes inspection?
You will almost certainly need a plumbing permit and possibly a building permit. Contact your local building department early in the planning phase to understand all requirements, necessary inspections (like the rough-in inspection), and specific code regulations for pipe sizing, slope, and venting to avoid costly rework.
What's the best way to break up the concrete floor, and what safety precautions should I take?
A demolition hammer or electric jackhammer is highly recommended for efficiency, which can often be rented. Wear heavy-duty work gloves, steel-toed boots, eye protection, hearing protection, and a dust mask to protect against concrete dust and flying debris. Be mindful of existing utility lines marked during the planning phase.
What are the most common mistakes when installing the underground DWV pipes, and how can I avoid them?
Common mistakes include incorrect pipe slope, inadequate solvent welding, and insufficient depth for drain lines. Ensure a consistent slope of at least 1/4 inch per foot for proper drainage, use proper primer and cement for strong, leak-free joints, and confirm all pipes are securely bedded in gravel to prevent shifting.