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Planning and Measurement — Planning Your Bathroom Plumbing Layout

Intermediate30 hours

Part of project

Bathroom Plumbing Installation: A Complete DIY Guide · Step 1 of 5

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In this video

Before laying any floor tile, you must carefully plan and measure the exact location for your freestanding tub. This involves marking the precise spot for the floor drain to align with the tub's drain assembly. You also need to measure and determine the tub's final position, ensuring there is adequate clearance from the back wall, any adjacent shower glass, and the shower curb. Also, measure for the placement of your tub filler faucet. Taking these measurements accurately at the rough-in stage is critical to avoid having to remove finished flooring to correct plumbing mistakes.

Goal: Accurately determine the placement of the tub and its plumbing rough-in.

  • All measurements for plumbing and tub placement must be finalized before the floor tile is installed. Having to move plumbing after tiling is a major and costly mistake.
  • Consider the shape of your tub. A tub with straight sides may require more clearance from a shower curb than one that tapers at the bottom.

Used in this video

  • Measuring Tape (brand: Unspecified, Tool Type: Measuring Tools)Measuring distances for tub placement and clearance.
  • Pencil (brand: Unspecified, Tool Type: Hand Tools)Marking the floor for drain location and tub placement.
  • Level (brand: Unspecified, Tool Type: Measuring Tools)Ensuring the subfloor area is level before measurement.
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FAQs

Given the 'intermediate' difficulty and '30 hours' estimated time, is this project suitable for someone with limited plumbing experience?

This project is challenging and requires careful attention to detail and local codes. While an intermediate rating means it's not for total beginners, someone with strong DIY skills can succeed by researching thoroughly and starting with smaller plumbing repairs first. Be prepared for potential time overruns, as unforeseen issues can extend the project timeline significantly.

Are the specialized tools like the SharkBite PEX cutter and Crescent pipe wrench absolutely necessary, or can I use more common tools?

While you might be able to use a hacksaw for PEX or standard adjustable wrenches, the specialized tools are highly recommended for efficiency, accuracy, and ease of use. The PEX cutter ensures clean, straight cuts crucial for leak-free connections, and a self-adjusting pipe wrench simplifies working in tight spaces and applying correct torque. Investing in these tools will save frustration and potential rework.

The materials list mentions PEX. Is PEX the best choice for a DIYer compared to traditional copper or CPVC, and why?

PEX is generally an excellent choice for DIYers due to its flexibility, ease of installation, and fewer connection points compared to rigid copper or CPVC. It requires fewer specialized soldering skills (unlike copper) and is more forgiving than CPVC for mistakes. The ability to run long, continuous lines reduces the risk of leaks associated with multiple fittings.

What are the most critical plumbing codes or safety precautions I need to be aware of when installing bathroom plumbing?

Always shut off the main water supply before starting any work and drain the lines. Crucially, familiarize yourself with your local plumbing codes regarding drain line slope, venting, trap arm distances, and pipe sizing, as non-compliance can lead to failed inspections, health hazards, or costly rework. Proper ventilation prevents sewer gases from entering your home and ensures proper drainage.

Transcript
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you do that, stability is not an issue. For smooth installation you need to remember a few things. One of the first things you need to remember is the drain hole that the tub is going into has to be in the right place. You have to measure that correctly when you move your drain wherever it needs to go. So you need to take into account not only where the drain is in the tub, how far the tub is from the wall, how far you want the tub from your shower glass, if you have shower glass, how far is the shower curb going to be from the tub depending on the shape if you can get this particular shape that could be an issue. So before you get to this point in your installation, you need to have measured for all that. Preferably before any of the tile is set on your floor. If you're tile guy or you have to go back and remove tile to redo plumbing, you won't be happy. This shape is very conducive in that not being a problem since it's a little

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