NAVAC NHB1 High-Flow Refrigerant Hose - 3/8" to 1/4" Fittings - 6 Feet Length - 1/2" Internal Diameter - Faster HVAC Evacuation and Recovery - 20 Microns Vacuum

It does what it is supposed to do. Pulls 500 micron fast and holds too.central ac split systems 1 and a half through 5 ton and up with 2 stage 8 cfm vacuum pump and micron gauge.works with manifold too just not as fast.

Used once on my home. Tried previously using old hoses, used manifold gauge set. digital one. The old hoses either are just too small or have leaks or have contamination or permeability. This hose, and a micron gauge at the opposite point, it went pretty quick with a larger pump 9 cfm. Well made at the moment. I'll try it a few more times.

Excellent hose for pulling a deep vacuum.

Very well made.

Perfect to use with my apion core removal tool way better for pulling a vacuum than 1/4 inch hoses worth the money

I always used my manifold hoses to evacuate but now I dedicated this hose for pulling vacuum's with isolation valves and a Micron gage on the high side. Works a lot faster.

This is a well made vacuum hose, I've run it down to 200 microns on a few systems and it holds vacuum well on decay testing. The thickness and stiffness of the hose is a double edged sword, yes it vastly improved the speed of achieving vacuum but it does make it awkward to use. With ¼ and ⅜ diameter hoses they're flexible enough to connect to the pump wherever you put it but because the hose is so thick and stiff it tends to dictate where you can and can't locate your vac pump.

What can I say, I bought this thing because I went wireless for probes, I thought this "1 hose" setup was absolute BS until I swapped a coil and used it. WOW I mean by the time I got my micron gauge to link up to the iPad I was pulling 3000 micron and DROPPING, by the time wtf came out of my mouth and had a double take I was seeing 900's, this is a must for hvac, it did interrupt my plans for lunch though 😆