P, N, RLC, FCN, PLP, DMS, Furnace Series and Venturi Lift System HVAC Air-Traps are Patented:
US9777957B1 US10775073B2 US11231203B1 US10605480B1 US11060786B1 US11808482B1
Maximum Pressures, Connection Sizes & Length
Testimonials
White Paper
It's Time to Reconsider the Use of P-Traps for HVAC Condensate Removal
by Nicholas H. Des Champs, Ph.D., PE, ASHRAE Fellow
Air-Traps Meet IMC® Code Section M307.2.4.1
RESIDENTIAL • COMMERCIAL • INDUSTRIAL • INSTITUTIONAL
HVAC Air-Trap
Engineering and Product Catalog
72 pages covering product information, IOMs, key drawings, maximum pressures and condensate flows, air leakage data and more.
PBS Segment on HVAC Air-Trap
Recently updated, a 7+ minute PBS segment on the HVAC Air-Trap that is currently airing.
Customer Air-Trap Installations
A video montage of HVAC Air-Trap installations over the years.
Des Champs HVAC Air-Trap™ waterless traps allow liquid condensate to drain from the HVAC equipment and simultaneously prevent air from entering or escaping from the equipment.
Solves Common Issues Associated with Standard P-traps
• Prevents air leakage
• Reduces trap height requirement by 1/2
• Predesigned — eliminating field-designed errors
• Operates Dry — Eliminating:
- Freezing and breaking
- Dryouts
- Sludge buildup
- Geyser effect
- Mold and mildew caused by geyser effect
Patented
The Air-Trap Concept
Now Available!
Review of how HVAC Condensate Traps are to Function as set Forth in the 2024 Uniform Mechanical and Plumbing Codes
by Nicholas H. Des Champs, Ph.D., PE, ASHRAE Fellow
DMS-Series
Negative and/or Positive Pressure Waterless HVAC Condensate Trap
Max. negative pressure
Max. positive pressure of WC
Available connection sizes
Length
1 inch
5/8"
3/4" (25mm) | 5/8" ID Drain Hose
2.95 inches
P-Series
Positive Pressure Waterless Trap
N-Series
Negative / Positive Pressure Waterless Trap
PLP-Series
Positive Pressure, Low Profile 0 - 40" WC Waterless Trap
RLC-Series
Residential / Lite Commercial Positive / Negative Pressure Waterless Trap
FCN-Series
Perfect for Ductless Mini-splits
Compact Residential / Lite Commercial Negative Pressure Waterless Trap
DMS-Series
Negative and/or Positive Pressure Waterless Trap
Patented: US12130045B1