Do they freeze up? I live in Wisconsin and worry the residual water may freeze. Thanks

I have 3 of these (similar buried systems) all running down angle underground and yes they can freeze up (residual water at/around the pop up, “Colorado clay” stops up the little relief drain hole) although just 1 of the lines seems to show drain water backup up to the downspout during melt…anyway, for winter I pull off the 4” at the bottom of the downspouts and slip on another adapter and length of 4” downhill” that is just open at the end (Maybe there’s a better way? because yes we have 4” laying on top of ground level that can trip over etc.!

How does the water make its way to the discharge with a hole in the bottom ?

The hole in the bottom is so small that the vast majority the water will be emitted from the top. The hole only allows a small amount to drain, which is important after that heavy flow has stopped.

My down spout is rectangular is there a piece to connect with that shape on one end and circular on the other?

Correct. There is a rectangular piece that fits on the downspout. Then you need your hose to connect to the drainage

Anybody use this in cold weather climates. Does it freeze up?

No. Have had 2 of then for several years in NY state. Never a problem. However they are used as an overflo for a drain pipe. I have no idea what happens when they are under a foot of snow. IBut f there is running water they won't freeze.

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💧 Keep your property dry and your lawn flawless with the NDS 422G Pop-Up Drainage Emitter!

LOW PROFILE SAFETY - Flush or slightly recessed installation minimizes trip hazards and blends into your lawn.
SMART WATER RELEASE - Automatically pops up to release water only when needed, preventing backflow and damage.
SEAMLESS INTEGRATION - Connects effortlessly to 4-inch sewer and drain pipes with a durable elbow adapter.
WEATHERPROOF RELIABILITY - Built-in weep hole prevents pipe freezing and stagnation in cold climates.
PROFESSIONAL GRADE DURABILITY - Made from high-density polyethylene and PVC for long-lasting performance.

The NDS 422G 4" Pop-Up Drainage Emitter with Elbow is a professional-grade drainage solution designed to discharge water away from structures and poor drainage areas. Featuring a 4-inch flush-mounted pop-up cap that opens under water pressure and closes to prevent debris entry, it connects easily to standard 4-inch sewer and drain pipes. Its all-weather design includes a weep hole to prevent freezing and stagnation, ensuring reliable year-round performance while maintaining a low-profile, safe installation.

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Size	4 Inch
Material	High Density Polyethylene
Brand	NDS
Colour	Green
Item dimensions L x W x H	17.1 x 17.1 x 15.2 Centimeters
Connector Type	Elbow
Thread Size	4 inch
Thread Type	NPT
Item Weight	0.7 Pounds
Number of Pieces	1
Global Trade Identification Number	00052063414225
Manufacturer	NDS Raindrip
UPC	052063414225 733353238928 783961332013
Item model number	422G
Product Dimensions	17.15 x 17.15 x 15.24 cm; 317.51 g
ASIN	B002CSQ0P2

NDS 422G 4" Pop Up Drainage Emitter with Elbow, Green

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