National Diversified 422 4-Inch Pop-Up Drainage Emitter by NDS

Rain pushed the top valve out and it was down the street to a main city gutter. Not very stable.

Took two hours to install two of these. Planted grass seed around then and over the corrugated pipe. I was very careful to not place them so that the tires of the rider mower would not go over the unit and potentially damage the pop up emitter. Since these do not have any springs on them to prevent them from popping up the suction of the mower pulled it up and chewed the pop up portion into about 10 pieces. Whole thing ruined! Unbelievable! I have purchased this item before but it had a spring installed so that the pop up portion would not come up too easily. I don't know if these are still available with springs loaded into the pop up portion but if they are I am going to try and find them and I would suggest you do the same. And since I bought them over 30 days ago and just now was able to install them I can't return the other one that hasn't been sucked into the stratosphere. Hope it doesn't happen. Extremely Disappointed.

Works like a charm. I went a bit further and actually built a dry-well, putting a 5' hole filled with rock under the emitter. Instead of the 90 degree elbow my emitter is installed on top of a 4" PVC T. I utilized the 90 at my downspout. My drainage now goes under my patio slab sidewalk. My hope is this takes me into colder weather to provide continued drainage below the frost, but I'm not certain how that will work in the dead of winter. Not much water flows in those months anyway. During heavy extended rainfall the pop-up just spills on the lawn anything my dry-well can't handle. Installed at ground level I can take the lawn mower right over it as advertised, worry free. I went to all the big hardware stores for any device like this and they looked at me like I had 2 heads. I found none of the chain stores in my area sold them or really knew what I was trying to build. No problem buying one here on Amazon though. So far, I'd recommend this device to anybody wanting to get rid of a troublesome downspout and drain sitting in a traffic area. A little work trenching, but no more tripping hazard.

Simple to install, bugs don't get in and does not seem to smell. We had 2 very large rainfalls and it performed well, did not pop up all the way but worked as advertised. It is good quality product, much better than Home Depot sells. Price is little high, but I'm expecting to have this for years.

Works great