FS12 – START COLLAR
12″ 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.
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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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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12″ 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.

Ceramic insulator for electric heat kits, sold by the piece. Bring the old one in and we will match it at the counter.
![MSHXLC - DUAL CHUCK (LONG [6], 1/4-5/16)](https://otp-hvac.com/wp-content/uploads/2024/11/MSHXLC_HEX_DRIVER-300x300.jpg)
Malco MSHXLC long-reach (6″) dual magnetic hex chuck driver. Reversible 1/4″ and 5/16″. Extra length reaches screws recessed in duct flanges and panels.

Yellow Jacket 25985 PLUS II hose set — 3 pack, 60″ long, 1/4″ with FlexFlow ball valve fittings. Red, blue, yellow. Instant shutoff at the hose end.

Goodman 0130M00140S transformer, 120V to 24V, 40VA. Steps down line voltage to 24V for the thermostat and control circuit. Direct OEM replacement for Goodman/Amana.

12″ x 12″ 4-way supply register with stamped steel face. White powder coat. Built-in multi-shutter damper for airflow control. Wall or ceiling mount.

Lennox 69W43 flame sensor replacement with 90-degree bend. Direct aftermarket fit for Lennox furnaces. Also listed as 790-801A1 and 102431-02. Single-prong Kanthal rod.

Rheem 42-101225-81 furnace pressure switch, -0.35″ WC. OEM replacement for Rheem and Ruud gas furnaces. Monitors inducer draft for safe ignition.

Manual reset micro limit switch, opens at 350°F. Commonly used as a flame rollout switch. Replaces 47-22861-01, B1370154, SRL350. Fits Goodman/Rheem furnaces.

Manual reset micro limit switch, opens at 135°F. Push-button reset after trip. Universal replacement for Supco SRL135 and Packard PRL135. Common in furnaces and unit heaters.