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Disconnect Bathtub Plumbing — Access the Plumbing

Beginner

Part of project

How to Replace a Deck-Mount Garden Tub Faucet · Step 2 of 9

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In this video

With the wall open, disconnect the plumbing. Use a pipe cutting tool, like the autocut tool shown, to cut the old copper water supply lines. To prevent leaks while work continues, install push-to-connect shut-off valves, such as SharkBite ball valves, onto the cut copper pipes. Next, address the drain. Unscrew and remove the overflow drain plate from inside the tub. Then, go to the access panel or open wall area and locate the nut connecting the tub's drain assembly to the house's P-trap. Loosen and unscrew this nut to disconnect the tub drain completely.

Goal: Cut water lines and disconnect drain

  • SharkBite fittings are a fast and easy way to cap open pipes without soldering, but ensure the pipe end is clean and deburred for a proper seal.

Used in this video

  • Autocut Pipe Cutter (Tool Type: Tubing cutter)Cutting the copper water supply pipes.
  • Impact Driver (brand: Milwaukee, Power Source: Battery)Removing the screws on the overflow drain plate.
  • Pliers (Tool Type: Pliers) · optionalLoosening the drain nut if it's too tight to turn by hand.
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FAQs

How challenging is this 'beginner' project, and what's a realistic time estimate for someone new to plumbing?

While rated beginner, accessing the plumbing under a garden tub can be physically demanding due to tight spaces. Plan for 2-4 hours if you have an access panel, but allow more time (up to a full day) if you encounter stuck connections or need to create access.

Why are specific Husky Basin Wrenches recommended, and can I use a different type of basin wrench?

The specific Husky basin wrenches are recommended for their telescoping and quick-release features, which are invaluable in the cramped spaces under a garden tub. While a standard basin wrench might work, these models significantly ease the difficulty of reaching and loosening nuts in tight spots.

What if my garden tub doesn't have an existing access panel?

If there's no access panel, you'll need to gain access to the plumbing from an adjacent wall, floor, or by carefully removing a side panel of the tub surround. This adds significant complexity and time to the project, potentially requiring professional help or additional DIY steps like cutting drywall.

What are the most critical steps to prevent leaks after installing the new widespread faucet?

Ensure you use plumber's putty or silicone sealant around the base of the spout and handles before installation, and apply Teflon tape to all threaded pipe connections. Hand-tighten supply lines, then give them a quarter to half turn with a wrench, and thoroughly inspect all connections for drips during the water test.