WYE444
4″ x 4″ x 4″ galvanized duct wye. Splits one 4″ round duct into two equal 4″ branches. Standard fitting for residential HVAC ductwork.
Walk in. We test every part free at the counter. Open to homeowners, contractors, and multifamily — no account or minimum order.
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Ten departments, organized the way our counter is. Every category is on the shelf today.
Bring your old part. We'll diagnose it, find the replacement, and bench-test the new one at the counter before you leave — so you only make one trip.

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4″ x 4″ x 4″ galvanized duct wye. Splits one 4″ round duct into two equal 4″ branches. Standard fitting for residential HVAC ductwork.

One-shot thermal fuse link – backup overheat protection in electric furnaces and air handlers.

16″W x 25″T return air filter grille. Holds a standard 1″ filter. Removable hinged face for easy filter changes. White steel, mounts on wall or ceiling.

14″ galvanized start collar for connecting round duct to a sheet metal or ductboard plenum. Crimped end for easy duct attachment. Standard residential HVAC ductwork fitting.

Nortek OEM hot surface ignitor. Silicon nitride. Replaces 903110, 903110A, and 903110B. Fits Nordyne, Miller, and Intertherm furnaces.

Aftermarket two-speed inducer motor for Carrier/Bryant furnaces. 115V, direct replacement for HC21ZE118. Also replaces HC21ZE116. Motor only — reuse existing housing.

DiversiTech CO-1 Zoom Spout lubricating oil, 4 oz. Telescoping spout extends up to 14 inches for hard-to-reach spots. General-purpose lubricant for HVAC and mechanical work.

1/2″ 90-degree liquid-tight elbow fitting. Makes a clean turn where conduit enters a junction box or disconnect. Non-metallic, weatherproof.

IRC-120 thermal imaging camera. Spots hot and cold spots in ductwork, finds electrical issues, and checks insulation. Compact and easy to use for HVAC diagnostics.

ICM2813 aftermarket control board for Lennox SureLight furnaces. Direct replacement for 83M00 and dozens of Lennox part numbers. Fits single and 2-stage models.