Siphon with screw cap, suitable for Queensize Camper sinks

Siphon with screw cap, suitable for Queensize Camper sinksThe Queensize Camper Siphon with Screw Cap is a professional grade P trap designed specifically for campervan grey water systems. UK exclusive at Project Yonder, this essential component creates a water seal that prevents sewer gases and odours from entering your living space while providing easy access cleaning through its removable screw cap design. Key Features Odour Prevention: P trap design creates water seal that blocks sewer gases from entering

The Queensize Camper Siphon with Screw Cap is a professional-grade P-trap designed specifically for campervan grey water systems. UK exclusive at Project Yonder, this essential component creates a water seal that prevents sewer gases and odours from entering your living space while providing easy-access cleaning through its removable screw cap design.

Key Features

• Odour Prevention: P-trap design creates water seal that blocks sewer gases from entering living space
• Removable Screw Cap: Easy access for cleaning blockages and maintenance
• Drain Set EVO Compatible: Designed to integrate seamlessly with Queensize Camper Drain Set EVO system
• Professional Grade: Durable construction for reliable long-term performance
• Grey Water Resistant: Purpose-built materials withstand soap, shampoo, and standard grey water contaminants
• 'Dark Edition' Finish: Sleek black aesthetic matches Queensize Camper system components
• Space-Efficient: Compact design fits under standard campervan sinks
• Tool-Free Maintenance: Screw cap removes by hand for quick access to trap interior

How It Works

The P-trap siphon uses a curved pipe design that retains a small amount of water at the bottom of the curve. This standing water creates a seal that prevents odours and gases from the grey water tank or drain system from traveling back up through the sink drain into your living space. The removable screw cap allows you to access the trap interior for cleaning hair, debris, or other blockages without disassembling plumbing connections.

Why You Need a P-Trap

Many campervan conversions skip the P-trap to save space, but this leads to persistent odour problems. Without a water seal, every odour from your grey water tank travels directly back up through your sink drain. A proper P-trap solves this issue while taking up minimal space under your sink.

Usage Tips

• Clean trap periodically to prevent buildup and blockages
• Inspect screw cap seal/O-ring for wear—replace if leaking
• Flush with clean water occasionally to clear any residue
• Never use harsh chemical drain cleaners—can damage polymer components
• If storing van in freezing temperatures, drain trap to prevent freeze damage