Wavin BV1B/UB HepvO Sanitary Waste Valve - 1-1/2"

Wavin BV1B/UB HepvO Sanitary Waste Valve — 1-1/2" Direct Connection

The Wavin HepvO Sanitary Waste Valve is the smart plumbing solution for RVs, campers, and marine vessels that need reliable, odor-free wastewater management. This patented valve automatically vents sewer gases while preventing them from escaping into your living space.

Why You Need This Valve

Standard drain pipes create siphoning and air-lock problems that lead to slow drains, gurgling sounds, and sewer odors entering your cabins. The HepvO valve solves this with a built-in air admittance mechanism — no external vent stack required, and your plumbing works faster and cleaner.

Key Features

• 1-1/2" direct connection — fits standard RV/marine waste lines
• Patented air admittance valve — automatically admits air to prevent siphoning
• Odor-free operation — seals sewer gases while allowing drainage
• Compact design — saves space vs. traditional external vents
• Durable plastic construction — lightweight, corrosion-resistant, long-lasting
• Easy installation — direct connection to standard waste outlet

Perfect For

• RV & camper grey and black water systems
• Marine galley and head (bathroom) drains
• Boat cabin plumbing upgrades
• Motorhome waste management
• Retrofitting existing drain systems
• Any enclosed vessel needing vented drainage

How It Works

Water flows down through the valve into your waste tank. As water drains, air is automatically admitted through the valve to prevent vacuum and siphoning. Sewer gases remain trapped in the tank — not in your cabin — while your drains flow freely and quietly.

Installation Tips

Install directly on your waste outlet with a standard slip/compression fitting. Can be mounted vertically or horizontally depending on your plumbing layout. No external vent stack or roof penetration needed, making this a cleaner installation for RVs and boats.