Waterway - Smart Plumb Adapter 1/2" Male to 3/4" Barb - 419-1920

Waterway – Smart Plumb Adapter 1/2″ Male to 3/4″ Barb

The Waterway 419-1920 is a 1/2-inch male to 3/4-inch barb adapter from the Smart Plumb hot tub and spa plumbing line. It joins 3/4-inch pipe to 1/2-inch pipe, which makes it a handy replacement coupler when two different pipe sizes meet in your spa plumbing.

What this Waterway adapter does

This coupler connects a 3/4-inch pipe to a 1/2-inch pipe. One end is a 1/2-inch male thread-style connection that fits into a 1/2-inch female fitting. The other end is the barbed side, which goes directly inside the 3/4-inch pipe.

It belongs to Waterway’s Smart Plumb range of hot tub and spa fittings and is made of ABS plastic.

Choosing the right adapter for your pipe

The type of pipe on the 3/4-inch side decides whether this part is the best fit. We particularly recommend this adapter if you are using 3/4-inch flexible pipe, because it gives a better fit there.

If you are using 3/4-inch clear tubing instead, a ribbed coupler is the easier and better-fitting choice.

Before ordering, check which pipe type is installed in your spa and which fitting you need to connect to. If you are unsure, compare it with the part number on your existing fitting.

Sizes and dimensions

The two ends have different outside diameters, so it is worth checking both before you order:

• 1/2-inch male end: outside diameter 21 mm, fits into a 1/2-inch female fitting.
• 3/4-inch end: outside diameter 20 mm, inserts into a 3/4-inch pipe.

Confused by sizes in inches and millimeters? Read our guide before measuring your plumbing.

Número de referencia

The Waterway part number for this adapter is 419-1920. Quote it when you compare the fitting with your current part or when you need to find the same replacement again later.

No documentation is listed for this part. It is a simple plastic plumbing adapter, so the fit depends on the pipe sizes and the pipe type described above.