NDS 421 4 in. Pop-Up Drainage Emitter with SDR35 Elbow - Green

NDS 421 4 in. Pop-Up Drainage Emitter with SDR35 Elbow - Green

Brand: NDS | SKU: 421

Product Overview

The NDS 421 combines a green pop-up drainage emitter with an SDR35 elbow to create a finished 4-inch discharge point for compatible buried drainage systems. Runoff pressure opens the cap so water can release at the surface, then the cap closes as flow subsides to help keep debris and small animals out of the line.

Key Features

• 4 in. pop-up drainage outlet
• Includes SDR35 elbow
• Pressure-activated cap
• Green finish blends into landscaping
• Closes during dry conditions

Common Uses

Residential and light-commercial drainage installations where compatible NDS components are used to collect, connect or discharge surface water.

Technical Specifications

• Nominal size: 4 in.
• Color: Green
• Included connection: SDR35 elbow

Compatibility & Installation Notes

Use at the terminal discharge point of a compatible gravity-drainage line. Confirm the pipe connection, finished elevation and a safe surface-discharge area before installation.

Frequently Asked Questions

What is included with NDS 421?

It pairs the pop-up emitter with an SDR35 elbow for the 4-inch discharge connection.

Does it stay open all the time?

No. Drainage flow opens the cap, and it closes again as the flow diminishes.

Why Buy From Big Frog Supply?

NDS 421 packages the 4-inch pop-up outlet with its SDR35 elbow so buyers can more easily identify the intended discharge configuration.

Color: Green