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General Clawfoot Tub Supply Line Installation

Tools & Materials:

The most important tool to use when installing a clawfoot tub is a licensed plumber. Most manufacturers will not accept warranty claims on items not installed by a licensed plumber.

  • Smooth-jawed Stillson (pipe wrench)
  • Level
  • PVC saw (if the piping coming through the floor is PVC)
  • VC glue and primer (if the piping coming through the floor is PVC)
  • 1-1/2" marvel coupling (a/k/a trap adaptor or transition adaptor)
  • Thread sealant (like Hercules)

When roughing in a clawfoot tub that is not yet on site always have the cut sheet or schematic on hand to be sure of the dimensions of the tub. You'll need 1-1/2" to 2" of 1-1/2" IPS piping above your floor for the waste line and 1-1/2" to 2" of 3/8" IPS piping above your floor for the water supplies. Please refer to the Drain and Supply Lines Rough-in Instructions or the video How to Choose and Install Supply Lines for placement of these pipes.

After setting the tub in place, make sure it is level. If you are placing the tub onto a gloss tile floor or installing an acrylic tub, we recommend using porcelain tub feet coasters to limit any movement.

The waste and overflow assembly should be assembled according to the manufacturer's instructions. The drain and overflow tubing should be cut to fit. Be sure to use a smooth-jawed Stillson wrench when tightening the lock nuts to prevent damage to the finished brass. Manufacturers will not accept returns on items that have wrench marks on the brass. Threaded connections should be secured with a thread sealant. Strom Plumbing waste and overflow assemblies are supplied with a reducing washer to make the connection from the 1-1/2" piping coming out of the floor to the 1-3/8" pipe of the waste assembly.

The supply lines connect directly to the tub faucet by a compression fitting. Nuts are supplied with the faucet and the supply lines, so you will likely have an extra set of nuts after installation. Cut the lines to fit, if necessary. If installing shut-off valves, the valves should be positioned just above the escutcheon between the piping in the floor and the supply line.

Make sure your plumber turns on the water and tests the tub and hardware for proper operation and drainage before leaving your site.