SMP400 – NITROGEN REGULATOR
Nitrogen regulator with CGA580 connection and 1/4″ output. Use for brazing purge, pressure testing, and leak checking. Adjustable output pressure for HVAC applications.
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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Nitrogen regulator with CGA580 connection and 1/4″ output. Use for brazing purge, pressure testing, and leak checking. Adjustable output pressure for HVAC applications.

Two-pack of magnetic static pressure probes for taking duct static readings with a manometer; the magnetic flange holds the probe to the duct hands-free.

Totaline P298-LEADS-10 compressor lead kit. Three THHN leads with sealed 600V heat-shrink butt connectors. In stock in Dallas.

12″ round ceiling diffuser with 360-degree airflow. Steel with white powder coat. Mounts in 12″ round duct opening. Great for bedrooms, hallways, and offices.

Aftermarket inducer motor assembly for Carrier furnaces. Replaces 349336-762 and 326628-762. Complete assembly with motor, housing, and wheel. Packard 66762.

Daizuki DXTHA-21 series single-zone ductless mini split heat pump system rated 17,500 BTU/h cooling and 18,300 BTU/h heating.

24″ x 24″ drop ceiling diffuser with 3-cone design for 4-way airflow. R6 insulated back. White steel. Lays into standard T-bar ceiling grid.

York / Coleman / Evcon OEM limit switch. Johnson Controls does not publish public specification sheets or cross-references for its York and Source 1 service parts, so no temperature rating, set point or amperage is listed here.

40+7.5 MFD 440V dual run capacitor. Powers both the compressor and condenser fan motor. Budget-friendly TrueLine replacement for residential AC.

Snap-disc furnace high-limit switch from the DL series; the number is the opening (cut-out) temperature in degrees F. It is a safety device that breaks the heating circuit when the plenum overheats, and a limit that keeps tripping points at restricted airflow or a failed blower rather than at the switch.