HVAC technicians, this Uniweld nitrogen regulator is exactly what you need for purging and pressure testing AC and refrigeration systems.

The 0-800 PSI delivery pressure range gives you plenty of control for various applications, and the durable brass piston design with diaphragm construction means this thing is built to last.

The CGA580 inlet connection and 1/4 inch male flare outlet are standard stuff that'll fit right into your existing setup.

The 2-inch gauges are actually readable without squinting - one shows content pressure up to 4000 PSI and the other shows delivery pressure up to 1000 PSI, both protected by rubber boots.

What's really nice is the large brass tee handle with stainless steel adjusting screw - it gives you smooth, precise pressure control without any galling issues.

There's even a self-reseating relief valve (though it's not meant to protect your downstream system).

Bonus feature - with the Uniweld F36 adapter (sold separately), you can use this with CO2 cylinders too.