LENNOX Fixed Set-Point Air Pressure Switch
The LENNOX Fixed Set-Point Air Pressure Switch (SKU 57W79, MPN 57W79) is a fixed, auto-reset, open-mounted SPST switch with a 1/4 in barb sample line connection. It operates at 24V AC switch voltage.
SKU 3G-OTH-69269
Local availability & support — Singapore
- Local office
- 20 Woodlands Link #09-05, Singapore 738733
- Phone
- +65 8878 8355
- Delivery
- Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
- Payment
- Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
- Ships to
- Singapore
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Product Description
The LENNOX Fixed Set-Point Air Pressure Switch (SKU 57W79, MPN 57W79) is a fixed, auto-reset, open-mounted SPST switch with a 1/4 in barb sample line connection. It operates at 24V AC switch voltage.
Frequently Asked Questions
What is a LENNOX 57W79 pressure switch used for?
The LENNOX 57W79 fixed set-point air pressure switch monitors air pressure in HVAC systems. It automatically resets and opens when pressure drops, protecting equipment like furnaces and air handlers. 3G Electric supplies this SPST switch with a 1/4 in barb connection for reliable pressure sensing.
What are the specifications of the LENNOX 57W79 pressure switch?
The LENNOX 57W79 is a fixed, auto-reset, open-mounted SPST pressure switch with a 1/4 in barb sample line connection. It operates at 24V AC switch voltage. The manufacturer part number is 57W79, and it is designed for fixed set-point air pressure applications.
Where to buy a LENNOX 57W79 pressure switch worldwide?
3G Electric supplies the LENNOX 57W79 pressure switch worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial solutions provider, we source genuine LENNOX parts like this fixed set-point switch for HVAC and combustion systems.
How to install a LENNOX 57W79 fixed pressure switch?
Mount the LENNOX 57W79 in an open position with the 1/4 in barb connection facing the sample line. Connect the 24V AC circuit to the SPST terminals. Ensure the switch resets automatically after pressure normalizes. Always follow OEM guidelines for safe installation and testing.
Used in
Common applications for LENNOXLENNOX Products
3G Electric supplies LENNOX fixed set-point air pressure switches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.