Why do you describe this as 3 inch and 4 inch? one answer suggests it's 4 inch not 3 inch... so isn't your description wrong? certainly unclear.

The pop up head fits into a 4" PVC SDR35 fitting or over a 3" PVC SDR35 fitting

The pipe we have is 3 3/8 inches o.d. The emitter fits over it, but not snugly. Can anyone tell me what kind of adapter to use?

Just use a screw(stainless to prevent rust). Drill a small hole threw the pipe and emitter rim and secure the emitter to the pipe. Common fix.

For anyone that has used the popup valve, do you get soil erosion around the popup valve? I'm going to be using this with a sump pump.

I've had mine for one year. It discharges an underground drainpipe leading from an upgradient catch basin that drains what used to be a waterlogged low area next to my house. I see no erosion by the popup, which is on a hillslope barely above the soil surface where a grassy lawn grows. It looks just like the rest of the lawn.

Does it come in gray or white color?

Gray or white ???? I don't know for sure. Mine are a dark forest green. I never seen anything to indicate there are any color choices. Does not seem likely but again I cannot say for sure. Try looking on internet for manufacturer web site. If green is undesirable I suppose some spray paint might be appropriate.

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

Product ID: 278541125

Details

Brand
NDS
Colour
Green
Item dimensions L x W x H
15.1 x 15.1 x
Material
Plastic
Size
3-inch &

🌿Erosion-safe water diversion

💧3-4 inch pipe compatibility

⚙️Hydrostatic pressure-activated pop-up

€ 27.58

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Elevate your drainage game—because your property deserves smart water control.

TRUSTED BY THOUSANDS - Rated 4.6 stars by nearly 4,000 professionals who demand reliable drainage solutions.
SEAMLESS 3 4 INCH FIT - Effortlessly connects to standard drain pipes for versatile installation.
DURABLE POLYETHYLENE BUILD - Robust, weather-resistant material ensures long-lasting performance in all conditions.
ECO FRIENDLY WATER MANAGEMENT - Directs runoff safely away from foundations and erosion-prone areas, protecting your landscape investment.
SMART HYDRO PRESSURE ACTIVATION - Automatically opens with water flow and closes as it subsides—no manual intervention needed.

The NDS 420C Pop-Up Drainage Emitter is a durable polyethylene device designed to connect with 3- and 4-inch drain pipes, automatically releasing stormwater runoff to safe discharge points. Activated by hydrostatic pressure, it prevents erosion and protects structures by efficiently managing water flow from grates, catch basins, and gutter systems.

Specifications

ASIN	B00HCA3SRS
Brand Name	NDS
Color	Green
Connector Type	Flange
Country of Publication	USA
Customer Reviews	4.6 4.6 out of 5 stars (3,992)
Global Trade Identification Number	00052063030005
Included Components	Installation Guide
Item Dimensions	15.1 x 15.1 x 5.7 centimeters
Item Type Name	Emitter, For 3 in. & 4 in. Drain Fittings,
Item Weight	82 g
Manufacturer	NDS, Inc.
Manufacturer Part Number	420C
Material Type	Plastic
Model Number	420C
Number of Pieces	1
Size	3-inch & 4-inch
Thread Type	NPT
UPC	052063030005
Unit Count	1.0 Count

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