JIFETOR 3 Way AC Manifold Gauge Set, HVAC Diagnostic Charging Tool for Auto Household R404A R134A Refrigerant with R134A Quick Couplers 3FT Charging Hose Can Tap Adapter Valve Core Tool

I purchased this AC Manifold Gauge Set about two years ago and just the other day I used it. It did the job well and in my experience with this set is that the 3' hoses, the manifold and the can tap worked very well for me but I could not use the included couplers, I tried many times but I could not get them to connect to the high and low ports. I had to use different AC port couplers to complete the evacuation and recharge of my trucks AC system. This very cheap manifold gauge set was well worth my small investment.

Gauges have to be assembled - some parts have to be screwed together, not difficult, everything is color coded. No tools needed, as finger tight is recommended.All necessary parts are included, except for a can of Freon, to top up an auto A/C system. This assumes the system has not been opened to air, there is some pressure in either the high or low pressure side, and that the system does not need to be evacuated. If the system has been opened, you'll also need a vacuum pump.There is no schrader valve on the manifold where the evac/charge (yellow) hose attaches. This valve would be used to purge air from the manifold prior to adding Freon. The purge can easily be accomplished by simply loosening the charge/evac (yellow) hose AFTER the can is attached to the charge (yellow) hose and tapped. In fact, some youtube videos recommend this method. The purge is necessary, as failing to purge will introduce air, and (even worse) water, into the A/C system.NOTE: wearing both gloves (nitrile is sufficient - not sure I'd trust cloth) and EYE PROTECTION is really necessary when handling Freon, as it can freeze both skin and eyeballs. Gloves are absolutely required if you purge the charge hose by loosening the screw-on fitting - the only method available with this tool. I absolutely would NOT trust this (or any) set of gauges to not leak at some point - most likely due to operator error - so be safe and wear your gear.The A/C on my '95 4Runner had been getting warmer and warmer for the last few years. These gauges allowed me to add the correct amount of R134A, by adding small amounts at a time and monitoring both gauges, to correctly fill a partially filled system. An R134A chart (google it) is nice to have, as it tells you what high and low pressure to look for based on ambient (outside) temperature.I'm now getting 38F-40F air at the dashboard vents. Prior to the refill, if it was 85F outside, I got 85F at the vents.

Overall not bad for the price if you’re not going to use them much. Hoses are really short and difficult to hook everything up. I have to set my vacuum pump in the engine bay so everything reaches. Gauge adjustment knobs feel cheap. I’ve had no issues with leaks yet. I did notice when drawing down a system the low side gauge will not go down as far as it should. Some of the accessories are not worth much. The valve tool split first use with little torque. It does come with two style can adapters, but the non-puncture one didn’t work for me so I used an adapter and the puncture fitting. Again good if you only use a few times or are just feeling the waters.

Great

My gauge came with red/low pressure knob off. No even screw marks were on. Hoses are too short (3 feet). Gauges covered with plastic covers, no any bump protection, and disassembling itself.Received it in the paper box (no plastic box) which was damaged and some parts were missing from it.Got no money to spend on tools like this.

Had a problem with a connector. One call and new part was sent

Decent product, but it doesn't have a purge valve so I'm not sure how anyone is doing a proper freon fill.

For the price is great if it doesn’t arrive defective like my. Was returned and fast refund.