Lennox 61M35 Condensate Drain Trap
An OEM Lennox condensate drain trap used on compatible Lennox HVAC equipment to route condensate properly through the drain system when the specified replacement trap is required.
Key Features
- Official OEM condensate drain trap for Lennox HVAC equipment
- Type: Trap
- Lennox Condensate Drain Trap Includes: Condensate Trap 78l3201, (2) O-Rings 83L4201, (2) Rubber Caps 18K0301, 1" Vinyl Cap 18K9201
Compatibility & Applications
- Listed for Lennox HVAC equipment (compatibility must be confirmed using the unit's full model/serial and the manufacturer-specified replacement part number).
- Must only be used where the manufacturer specifies this exact part number: 61M35.
Installation & Operation Notes
- Installation should be performed by a qualified HVAC service technician.
- Reference the unit's service/installation manual for safe shutdown, access, and the correct drain routing for that specific model.
- Lennox condensate drain guidance indicates that a trap must be installed between the drain connection and an open vent for proper condensate removal, and notes maintaining a minimum drain-line pitch of 1" (25 mm) or 3/4" (19 mm) per 10 ft (3 m) of line.
Maintenance & Troubleshooting
- This part is commonly addressed when troubleshooting condensate leakage or when the existing trap is damaged/broken.
- Customer feedback includes cases of persistent leaking traced to a hairline fracture in the trap body, resolved by replacing the trap.
- If a leak continues after replacement, follow the unit documentation to verify correct drain routing, venting, and sealing at connections.
User Reviews & Q&A Summary
- Correct replacement: Reviews frequently describe it as a perfect/exact replacement that works as expected once installed.
- Ease of install & sourcing: Many users mention easy installation and that ordering the correct furnace part online was straightforward.
- Fit caution: A recurring note is that it does not fit all Lennox furnaces, so verifying the correct trap part number for the unit is important.
- Quality/defect edge cases: A small amount of feedback mentions leaking tied to a suspected crack/defect out of the box, but also highlights fast resolution/replacement support.
- Value & service: Users often praise quick delivery and service, with occasional comments that price is the main downside.