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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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

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

Product ID: 3232296

Details

Brand
NDS
Color
Green Plastic
Connector Type
Flange
Item Weight
0.18 Pounds
Item dimensions L x W x H
5.94 x 5.94 x
Material
Plastic

💧40 GPM water release

🚜Supports pedestrian & lawn tractor traffic

🟢Fits 3" & 4" sewer/drain fittings

€ 36.92

Duties & taxes included

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Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Stay dry, stay ahead — the smart drainage solution that pops up when you need it most!

LIFETIME PEACE OF MIND - Backed by a hassle-free limited lifetime warranty, ensuring your drainage system stays reliable season after season.
SMART POP UP MECHANISM - Innovative cover rises up to 1 inch under water pressure to release flow, then closes flush to prevent trip hazards and mower damage.
ROBUST TRAFFIC READY DESIGN - Durable enough to support pedestrian and lawn tractor traffic when installed correctly—built for real-world use.
EFFORTLESS STORMWATER MANAGEMENT - Seamlessly channels runoff to safe discharge points, protecting your property from costly water damage.
UNIVERSAL FIT EASY INTEGRATION - Compatible with 3-inch and 4-inch sewer and drain fittings, plus adaptable to other pipe types with simple adapters.

The NDS 420C Pop-Up Drainage Emitter is a durable, green polyethylene device designed to efficiently release up to 40 gallons per minute of stormwater runoff. It fits standard 3-inch and 4-inch sewer and drain fittings, supports pedestrian and lawn tractor traffic, and features a pop-up cover that rises with water pressure to prevent flooding while minimizing trip hazards. Ideal for protecting properties from water damage, it comes with a limited lifetime warranty for lasting reliability.

Specifications

ASIN	B00HCA3SRS
Best Sellers Rank	#1,813 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #2 in Automatic Irrigation Accessories
Brand Name	NDS
Color	Green Plastic
Connector Type	Flange
Customer Reviews	4.6 4.6 out of 5 stars (4,086)
Global Trade Identification Number	00052063030005
Included Components	NDS - 422
Item Dimensions	5.94 x 5.94 x 2.25 inches
Item Type Name	NDS Pop-Up Drainage Emitter, For 3 in. & 4 in. Drain Fittings, Green Plastic
Item Weight	0.18 Pounds
Manufacturer	NDS, Inc.
Manufacturer Part Number	420C
Manufacturer Warranty Description	Warranty.
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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