Mastercool 53010-AUT Automotive Nitrogen Pressure Test Kit

Works great for finding leaks in A/C system.

Must have for all auto repair shops that do AC work. Has allowed us to find leaks that we were unable to find with dye previously. Can’t believe we didn’t buy one sooner! Quick and easy way to find small leaks!

Had some leaks on a/c systems i needed to find. I had a basic guage but it just wasn't great so I bought this. Great product for the money, very durable. It's very easy to use and figure out.

This is the only way to test an A/C system hands down the Quickest and most accurate .. no more dyes and uv flashlights .

Very happy with the product, apart for the connector for the low side was leaking when connected.

With the rising cost of R134A, I finally broke down and purchased this regulator kit to use for checking A/C systems on medium and heavy duty trucks. I should have purchased a long time ago. Works great, and is another quality Mastercool product.

I use this pressure test regulator to test for leaks in both home and automotive ac. This regulator is high quality. I recommend if you want to make sure these is no leaks prior to charging with refrigerant.

This is the best kit to use for charging a/c systems with nitrogen. You can mess around and build a kit like this with mixed results or just by this and be up and running same day without having to track down obscure fittings.

Decided to Nitrogen test an A/C leak on my 2017 Ford Expedition. As soon as I pumped the Nitrogen in, the hissing sound started. Found the leak within seconds. Worth the money, solid construction, easy to use instructions. I would recommend this unit to anyone who needs a nitrogen test kit for their automotive use.

is a must have for a/c work, the only negative about the tool is that the instructions are not the most clear, would have like the instructions to be more detailed

Works perfectly

The only thing that bothers me about this is the regulator adjustment screw feels cheap, it isn’t as smooth as I want, but I’m picky. I don’t do reviews often, but this one I have to. This kit is well worth the money. I’m a mechanic by trade, busy life/not enough time so I took the girlfriends SUV to a dealership to find a slow AC leak, I told them it holds a vacuum overnight and passes a vacuum leak test, that they need to use nitrogen, got blank stares at 2 different dealerships. Long story short, they wanted to replace a bunch of parts without properly diagnosing. I bought this kit and a bottle of nitrogen, found the leak in 10 minutes and fixed it (cracked manifold that bolts to firewall/evaporator). Counting having to buy a bottle of nitrogen and this kit, I still saved myself $900 in parts and labour from the dealership.