NDS 420C Pop-Up Drainage Emitter, 3-Inch and 4-Inch

So easy to install and works fantastic. Just make sure you use perforated pipe or drill hole in elbow going up to prevent freezing in winter.

I recently installed the Pop-Up Drainage Emitter as part of my yard's drainage system, and I couldn't be happier with the results. It’s incredibly easy to install and fits perfectly with standard 4-inch drain pipes. The pop-up top works just as advertised—only opens when there’s water flow, keeping debris and critters out when not in use. What I really appreciate is the low-profile design. It blends in nicely with the lawn and doesn’t get in the way of mowing or foot traffic. Even after several heavy rainstorms, the emitter has performed flawlessly, preventing any pooling or flooding in problem areas. If you’re looking for a simple, effective, and durable solution for lawn drainage, this is it. Highly recommended!

Ordered for my dad who ruined his with the lawnmower. This was perfect fit and he was very happy to get it so quickly

2nd time I have purchased this pop up drain emitter (for a different drain), Fits nice and snug and works great. Highly recommend!

Exactly as described. Replaced a similar one perfectly