Set and Secure the Shower Pan — Planning, Layout, and Permits
Part of project
How to Rough-In Plumbing for a Basement Bathroom · Step 1 of 7
In this video
First, dry-fit the shower pan and use a level to ensure it is perfectly level on all four sides, using shims if necessary. Next, install the drain assembly by applying plumber's putty to the drain flange and pipe dope to the underside, then tightening the gaskets and nut. Lay down paper on the subfloor, mix a batch of mortar, and spread it evenly. Carefully set the shower pan into the wet mortar, pressing down to ensure full contact and re-checking for level. Secure the pan's flanges to the studs with the provided clips and screws. Once the mortar has set, use an inside pipe cutter to trim the PVC drain pipe flush. Finally, install the rubber gasket, brass nut, and drain cover plate.
Goal: Install shower pan
- If the pan isn't level during the dry fit, use wood shims or a full shingle to raise the low side.
- Place paper on the subfloor before applying mortar to prevent it from falling through cracks in the floorboards.
- Wiggle the pan when setting it in mortar to ensure it makes good contact with both the mortar and any shims used for leveling.
Used in this video
- Level (Tool Type: Measuring Tools) — Ensuring the shower pan is perfectly level.
- Adjustable Pliers (Tool Type: Hand Tools) — Tightening the drain assembly nut.
- Utility Knife (Tool Type: Hand Tools) — Trimming excess plumber's putty.
- Trowel (Tool Type: Hand Tools) — Spreading mortar evenly.
- Drill/Impact Driver (Tool Type: Power Tools, Power Source: Battery) — Securing pan clips and cutting the drain pipe.
- Inside Pipe Cutter (Tool Type: Drill) — Cutting the PVC drain pipe flush from inside the pan.
- Screwdriver (Tool Type: Hand Tools) — Tightening the brass drain nut.
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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.
Set and Secure the Shower Pan — Planning, Layout, and Permits
Part of project
How to Rough-In Plumbing for a Basement Bathroom · Step 1 of 7
In this video
First, dry-fit the shower pan and use a level to ensure it is perfectly level on all four sides, using shims if necessary. Next, install the drain assembly by applying plumber's putty to the drain flange and pipe dope to the underside, then tightening the gaskets and nut. Lay down paper on the subfloor, mix a batch of mortar, and spread it evenly. Carefully set the shower pan into the wet mortar, pressing down to ensure full contact and re-checking for level. Secure the pan's flanges to the studs with the provided clips and screws. Once the mortar has set, use an inside pipe cutter to trim the PVC drain pipe flush. Finally, install the rubber gasket, brass nut, and drain cover plate.
Goal: Install shower pan
- If the pan isn't level during the dry fit, use wood shims or a full shingle to raise the low side.
- Place paper on the subfloor before applying mortar to prevent it from falling through cracks in the floorboards.
- Wiggle the pan when setting it in mortar to ensure it makes good contact with both the mortar and any shims used for leveling.
Used in this video
- Level (Tool Type: Measuring Tools) — Ensuring the shower pan is perfectly level.
- Adjustable Pliers (Tool Type: Hand Tools) — Tightening the drain assembly nut.
- Utility Knife (Tool Type: Hand Tools) — Trimming excess plumber's putty.
- Trowel (Tool Type: Hand Tools) — Spreading mortar evenly.
- Drill/Impact Driver (Tool Type: Power Tools, Power Source: Battery) — Securing pan clips and cutting the drain pipe.
- Inside Pipe Cutter (Tool Type: Drill) — Cutting the PVC drain pipe flush from inside the pan.
- Screwdriver (Tool Type: Hand Tools) — Tightening the brass drain nut.
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.