DW4SC – STORM COLLAR (4″)
4-inch double-wall storm collar for Type B gas vent. Seals the gap where the vent pipe passes through the roof. ECCO Manufacturing 200490. Galvanized steel.
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-inch double-wall storm collar for Type B gas vent. Seals the gap where the vent pipe passes through the roof. ECCO Manufacturing 200490. Galvanized steel.

35+10 MFD 440V dual run capacitor. Powers both the compressor and condenser fan motor. Fits most residential AC systems. American-made by Titan HD.

1/2″ ACR copper 90° long radius elbow (C x C). Wrot copper for brazing. Changes direction of refrigerant lines without restricting flow.

40+10 MFD 440V dual run capacitor. Powers both the compressor and condenser fan motor. Budget-friendly TrueLine replacement for residential AC.

White-Rodgers 21M51U-843 universal 2-stage furnace control board for PSC motors. Replaces hundreds of OEM boards. LED diagnostics built in.

Two-pole 40A contactor with 24V coil (C240A). The most common residential AC contactor. Controls power to the compressor in your outdoor unit.
![MSHXLC1 - DUAL CHUCK (LONG [6], 5/16-3/8)](https://otp-hvac.com/wp-content/uploads/2024/11/MSHXLC1_HEX_DRIVER_CHUCK-300x300.png)
Malco MSHXLC1 long-reach (6″) dual magnetic hex chuck driver. Reversible 5/16″ and 3/8″. Extra length for recessed screws on ductwork and equipment.

Perforated galvanized metal strap (plumber’s strap), 3/4″ wide x 100-foot roll. Pre-punched holes for easy fastening. Used to hang ductwork and piping.

Sanhua 3/4″ ODF service valve (SERVICE-BAR-6-S-T). For refrigerant charging, vacuum pulling, and line isolation. Rated 650 PSI. Compatible with R-22 and R-410A.

ToughBuilt TB-KP-102 Waterproof knee pads. Closed-cell high-density foam with pliable outer shell. Keeps knees dry on wet surfaces.