NDS 420C Pop-Up Drainage Emitter, fits 3-Inch and 4-Inch Sewer and Drain Fittings, Works with Drainage Systems Including Catch Basins and Channel Drains, Green

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!

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

Great sewer cap. Love not looking at upside down cover

Plastic seems of good quality and durable. Easy to pop in the gutter pipe leading away from house. So far it is working effectively and doing a great job of popping up and letting the rain water escape from gutters. Be very careful when using a lawn mower around the emitter because this is the third time I have replaced this same area emitter. I have a tendency to forget and hit emitter with lawn mower tire and break off an edge or two because the emitter is sloping in the ground. I do occasionally pop off the emitter and clean out the trash, leaves and muck still in pipe. Time will tell how long this emitter will last. I think these are priced expensively, however, what isn't expensive these days?

My contractor used cheap and ill fitting grates for the drainage system. Rain just pushed them out and down the steep hill. These fit tight. The pop up valve stays closed until it rains. Grass and critters can't get in!

Works great, excellent product for the money. Easy to install.

This pop-up replacement is much stronger and better quality than the original and fits perfectly. I’m going to be proactive and replace the rest of mine.

1) This product provides great value for your money. It helps so much with yard drainage and costs very little. 2) It's so durable. I've been monitoring it for about 3.5 years now, and it has withstood all the sun, heat, and thunderstorms nature has thrown at it. Also, it has never caught the blade of my lawn mower, which has probably passed over it around 100 times now. 3) The rounded interior contours, internal ribs, and high-density polyethylene (HDPE) construction contribute to the overall strength of the product. 4) It's so simple to install if you've done your measurements in advance. 5) Cleaning the product is easy, although I've almost never had to over the years. But it's just as effortless to remove this product from the pipe as you might expect for something that stays embedded in your lawn all year long. 6) The emitter pops up just like it's supposed to during heavy storms that cause copious drainage. When installed properly, this product performs extremely well.

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.

Fit perfectly, good quality replacement item.

In my opinion these are a bit expensive for what they are, but they work well and are easy to install (bit of PVC cement and slide onto your pipe). I did a drain with one of these using 4" perforated PVC drain pipe, and it works perfectly for my sump pump drain. If installed flush to the ground, it allows you to have a mostly-hidden drain that's easy to mow over top of. Dropping 1 star because of the price, but they are definitely a 5 for functionality.

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

Pops up easily. This design allows for a few leaves to come out when raining. I don't have a lot of large trees so I don't know how it would handle that situation. I am able to remove it during the winter season so it wont freeze shut. Overall, a good product.