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Install Wooden Blocking for Valve — Install Blocking and Mark Valve Position

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How to Rough-In a Shower Valve: A Step-by-Step DIY Guide · Step 2 of 4

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To properly support the shower valve, install a wooden block between the wall studs. Measure the distance between the two studs where the valve will be mounted. Cut a piece of 2x4 lumber to this length using a circular saw or reciprocating saw. Position the block at the desired height for the valve, which is typically 42 inches from the rough floor. Use a level to ensure the block is perfectly horizontal and secure it firmly between the studs by driving long wood screws through the studs and into the ends of the block.

Goal: Create a solid mounting surface for the shower valve.

Used in this video

  • Tape Measure (brand: Milwaukee, Tool Type: Measuring Tools, Power Source: Manual)Measuring the distance between studs and the height for the block.
  • Speed Square (brand: Milwaukee, Tool Type: Measuring Tools, Power Source: Manual)Marking a straight cut line on the lumber.
  • Circular Saw (brand: Makita, Tool Type: Power Tools, Power Source: Battery)Cutting the 2x4 lumber to the required length.
  • Impact Driver (brand: Hilti, Tool Type: Power Tools, Power Source: Battery)Driving screws to install the block.
  • Level (brand: Empire, Tool Type: Measuring Tools, Power Source: Manual)Ensuring the wooden block is installed horizontally.
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FAQs

How difficult is roughing-in a shower valve for a beginner, and what's the typical time commitment?

While rated "beginner," this project requires careful attention to detail, especially with water connections and leak prevention. For a beginner, expect it to take a full afternoon or even a day, accounting for preparation, learning, and thorough leak testing. Rushing can lead to costly mistakes.

What are the most important safety precautions to take during this plumbing project, especially regarding water and tools like a torch?

Always shut off the main water supply to the house before starting to prevent flooding and water damage. When using a Bernzomatic Pen Torch for soldering, ensure you have proper ventilation, a fire extinguisher nearby, and wear appropriate safety glasses and gloves to prevent burns. Always double-check electrical safety if working near any electrical outlets.

How do I ensure the shower valve is installed at the correct height and depth for comfortable use and the finished wall?

Always follow the shower valve manufacturer's instructions for rough-in dimensions, especially for the recommended height of the valve. Use a level to ensure the blocking and valve are perfectly plumb and level. Remember to account for the thickness of your finished wall material (e.g., tile and backer board) when setting the valve depth to ensure the trim fits flush and the handle isn't too recessed or protruding.

What steps should I take immediately if I discover a leak during the final water pressure test?

If you find a leak, immediately turn off the main water supply to the house again. Identify the exact source of the leak; it's often a poorly soldered joint or a loose threaded fitting. If it's a solder joint, drain the pipes, thoroughly clean and flux the area, and re-solder. If it's a fitting, tighten it appropriately, being careful not to overtighten.

Transcript
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that so much quicker than using channel logs a wrench or a crescent and we kept the bottom since we're in a shower so there's three sides cold hot and an outlet for the shower head this is a shower cut in the block the battery died it happens set in the valve at 42 inches high we're marking where it goes and drilling a hole for the hot side of the valve because it's probably not gonna fit screw your block make sure it has a level on it's level always and make sure your tile thickness for the valve is right it has a minimum and a maximum on the valve and you can set where that valve would go if it's too far in or it's too far out maybe instead of a two by four you have to swap to like a plywood piece that is half an inch or something like that but determine whether the location at by preference or a good location we're taping this

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