How To Measure Bathtub Drain

Essential Aspects of Measuring Bathtub Drains

When it comes to replacing or repairing a bathtub drain, accurate measurements are crucial for a successful outcome. A poorly measured drain can lead to leaks, improper drainage, and additional headaches down the road.

To ensure a precise measurement, follow these essential steps:

1. Determine Drainpipe Diameter:

Use a measuring tape to determine the outer diameter of the drainpipe. Measure from the outside edge of the pipe to the opposite outside edge.

2. Measure from Overflow Plate to Drain Hole:

Locate the overflow plate, which typically has a small hole at the top of the bathtub. Measure from the center of the drain hole to the bottom of the overflow plate.

3. Determine Drainpipe Length:

Measure the length of the drainpipe from the bottom of the overflow plate to the point where it connects to the trap. Ensure that you account for any elbows or bends in the pipe.

4. Measure Trap Arm:

The trap arm is the curved section of pipe that connects the drainpipe to the main drain line. Measure the length of the trap arm from the connection point to the end of the curved section.

5. Determine Drain Assembly Length:

The drain assembly is the visible part of the drain that sits inside the bathtub. Measure the length of the drain assembly from the top of the drainplate to the bottom of the tailpiece.

Additional Tips:

Use a flexible measuring tape for accurate measurements around bends and angles.
Round measurements up to the nearest inch or centimeter to ensure a proper fit.
Consider the type of drain finish and material when selecting a replacement drain.
If you are unsure about any measurements, consult a professional plumber for assistance.

By following these steps, you can confidently measure your bathtub drain and ensure a successful replacement or repair.