Bar Maid Fly-Bye Floor Drain Trap Seal for 3.5" Drain Pipes

Patented one-way valve allows fluid to flow down without impeding flow rate and lets nothing come back up.

• Pesticide-free, No VOCs
• Makes drains virtually maintenance free
• Effectively stops fruit flies and insects from coming up
• Acts as a vapor barrier to keep bacteria, odors, and gases in the drain for improved indoor air quality
• No need to add primers and fresh water