Can this be used in under a normal vanity in a house?

Yes. That's exactly where I used it due to space constraints. Couldn't fit a normal P- trap. Works great.

Will this equalize grey tank pressure like a vent? Building campervan and can’t easily vent tank outside.

All this is a trap for your shower or sink, not a vent. It is like P trap under your sink or shower to keep odors coming back up sink. I used one under my shower where I have no room for a P-trap.

Does this have a check valve inside or what method does it use to prevent backflow? What does the interior look like and how much pressure is needed?

Yes, it a check valve, there is a soft tube inside that goes flat and stops on back flow.

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BV1B/UA Hepvo Waterless Waste Valve 1-1/4"

Product ID: 24213862

Details

Brand
All Season
Exterior Finish
painted
Inlet Connection Size
8 Inches
Inlet Connection Type
National Pipe
Item dimensions L x W x H
8 x 8 x 8
Material
Stainless

🔇No gurgling noises

🚫No foul odors

❄️Freeze-proof self-sealing membrane

₨1744

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚿 Upgrade your plumbing game—ditch the water trap, embrace the future of odorless, silent waste valves!

SILENT SMOOTH - Say goodbye to annoying gurgling noises thanks to innovative pressure equilibrium technology.
ODOR FREE LIVING - Eliminates sewer air escape with a hygienic self-sealing membrane—no more unpleasant smells invading your space.
FREEZE RESISTANT DESIGN - Unlike traditional traps, it won’t fail in cold weather—perfect for year-round reliability.
SPACE SAVING INSTALLATION - Versatile vertical or horizontal setup fits tight spaces where standard traps can’t.
LOW MAINTENANCE HIGH PERFORMANCE - Resists limescale buildup and requires only simple periodic cleaning to keep running flawlessly.

The BV1B/UA Hepvo Waterless Waste Valve is a stainless steel, self-sealing valve that replaces traditional water traps by preventing sewer odors and gurgling noises without relying on water seals. Its innovative membrane design resists evaporation, siphonage, and freezing, ensuring reliable, low-maintenance performance in both vertical and horizontal installations.

Specifications

ASIN	B004A2YFG4
Best Sellers Rank	#130,601 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #136 in Faucet Valves
Brand	All Season Marketing
Brand Name	All Season Marketing
Connector Type	Trap
Customer Reviews	4.5 out of 5 stars 216 Reviews
Exterior Finish	painted
Global Trade Identification Number	05027888240354
Included Components	All Season Marketing BV1B/UA Hepvo Waterless Waste Valve 1-1/4"
Inlet Connection Size	8 inches
Inlet Connection Type	National Pipe Tapered
Item Dimensions	8 x 8 x 8 inches
Item Type Name	All Season Marketing BV1B/UA Hepvo Waterless Waste Valve 1-1/4"
Item Weight	0.22 kg
Item dimensions L x W x H	8 x 8 x 8 inches
Manufacturer	HEPVO
Manufacturer Part Number	BV1BUA114
Material	Stainless Steel
Material Type	Stainless Steel
Model Number	BV1B/UA
Number of Items	1
Number of Packs	1
Number of Pieces	1
Number of Ports	2
Outlet Connection Size	8 inches
Outlet Connection Type	FNPT
Size	1.25 inches
Specification Met	ULC
Thread Size	1.25 inches
Thread Type	FNPT, National Pipe Tapered
Unit Count	1 Count
Valve Type	Hepvo Waterless Waste Valve

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