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Assemble Faucet and Supply Lines β€” Install the Water Supply Lines

Beginner

Part of project

Shower Rough-In Plumbing: A Step-by-Step DIY Guide Β· Step 3 of 4

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In this video

Identify the hot and cold water supply lines, which are typically marked with red and blue. Attach these flexible lines to the corresponding ports on the faucet's valve body. Hand-tighten first, then use a wrench to snug the connections without over-tightening.

Goal: Generic Faucet Installation (Two-Handle)

  • Be careful not to over-tighten the supply line connections, as this can damage the seals.
  • The hot water port is usually on the left and marked with a red indicator.

Used in this video

  • Faucet (brand: Unspecified) β€” The main component of the installation.
  • Supply Lines (brand: Unspecified) β€” Connecting the faucet to the water supply.
  • Wrench (brand: Unspecified) β€” Snugging the supply line connections.
  • Gloves (brand: Unspecified) Β· optional β€” Keeping hands clean and protecting the faucet finish.
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FAQs

How difficult is this shower rough-in project for a beginner, and what's a realistic time estimate?

While labeled "beginner," this project requires meticulous attention to detail for measurements and connections. A novice can accomplish it, but allocate at least a full weekend, or even longer, to work carefully, learn the process, and handle any unforeseen challenges without rushing.

The tool list includes a "Zest Candle." Is that correct, and are the PEX-specific tools like the crimp tool absolutely necessary?

The "Zest Candle" is an error and is not needed for plumbing. However, specialized PEX tools such as the PEX cutter and a crimp tool are absolutely essential for creating secure, leak-proof connections. You can often rent these specific PEX tools from home improvement stores if you prefer not to purchase them.

What are the most common causes of leaks in PEX supply lines, and how can I ensure my connections are watertight?

Leaks typically stem from improper crimping or damaged tubing. Always make clean, perpendicular cuts with your PEX cutter, ensure fittings are fully seated, and use your crimp tool correctly. Crucially, check every crimped connection with a go/no-go gauge for proper tightness.

How should I thoroughly test the PEX supply lines for leaks before closing up the walls?

After capping all open PEX ends, slowly introduce water pressure to the system. Inspect every connection point visually for drips, listen for any hissing, and feel for moisture. Keep the system pressurized for several hours and re-check periodically to catch any slow leaks before proceeding.

Transcript
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That's solid. It's got a good inch and a half grab to it. It doesn't say which one's hot and which one's cold so it just shows you a red mark here and a blue mark the red marks on this side so I'm assuming this is the hot port and this is the cold port. So you just screw in there. It's probably easier to do it just to take these out. Just put them in first. All right snug them down with the wrench so I couldn't go no more but I didn't over tighten them.

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