Orion Motor Tech AC Gauges, AC Manifold Gauge Set for R134a R12 R502 Refrigerant, 3 Way Car with 5FT Hoses Couplers & Adapter, Puncturing & Self Sealing Can Tap Freon Charge Kit

I am impressed by the quality of this set, especially for the price. As a retired mechanic/technician of 45 years of experience I've worked with many manifold sets, from cheap to very expensive as well as automatic recovery/recharging stations. This set is as good as any for the DIYer. It has everything needed for the weekend warrior to properly charge a R134a system or even an old R12 system (except for a clamp-on can tap). I highly recommend anyone servicing their own unit to use a full set instead of those low-side only quick charge systems because if you cannot monitor both sides of the system, you can set yourself up for big problems. This set will allow you to properly charge and diagnose problems you may have in the system. I highly recommend it for both quality and price.

If you know what you are doing, this product is perfect for R134A. It is cheap and does what you need. I had to repeat the process of discharging, vacuuming, holding vacuum and even recharging few times because there was a leak in my system and it did a perfect job at all times. Helped me a lot during the process.

Pros of this kit is the glass window so you can see if your getting liquid freon or not. Also comes with decent quick connects for R-134A hookups. Gauges seem to be accurate.Cons of this kit, where to start!1. Connectors for lines in rear (storage purposes) have no adapters for the quick connect fittings they supply.2. The storing connectors are on the rear of the unit.3. Any adapter used on the end of the line will always need to be retightened pretty much every use4. You will have to bend the hanger out to make it useful.5. Your yellow line should come standard with a 1/2 ACME end instead of a obsolete NPT fitting used with R-22 setups, included adapter is OK to use.6. Valves take forever to open and close.I work on buses with 25 pound systems and these work perfectly fine. I had no issues and gauges did not give me any weird readings. I do not pull my gauges apart after every use, I hang them off my box until the next time. Although opening and closing the valves takes forever to open and close, I don't use the tank valves they send with the kit. Because we hook up to a 120lb bottle. I give them 4 stars because they work.

Have used multiple times; quality is plenty good enough for occasional users like me. Cars lose typically lose 20-40% of their refrigerant every every 3-5 years; this kit has been great to see how low the high and low side pressures have gone. Put together with a temperature/pressure chart for R134, lets you top up the car with refrigerant in the driveway for next to nothing.A can of r134a at walmart is about $10, resealable if you don't use it all and one can might top off 2-3 cars depending on how much refrigerant has leaked out. Paid for itself on the first use; a single "evac and recharge" service runs over $150 around here. Two thumbs up

AS others have noted, the fittings are a bit on the chintzy side, but after years of borrowing a friends manifold gauge set from Harbor Freight, I decided I had to finally get my own updated set that would do R134a as my ancient R12 set was literally falling apart.All in all it worked exactly as expected, the case keeps it from being knicked around and degraded in the shop, and overall it is easy to use.As someone that started out as a pro mechanic, I can say without a doubt this is NOT tool truck quality stuff, but it is better than what you get at the cheap tool stores, or even at the auto parts houses.Only issue is PAY ATTENTION to the adustable quick connects, run them all the way out so that then center is not pushing the valve in when you connect. You MIGHT get away with it on the low side, but forget it on the high side...So far I have used this to service my '04 F150, '06 Chev, '01 Saturn and my brother in laws '00 Lexus, all with no issues from the gauge set...Works well with the HF pnuematic vacuum pump for pumping down previously opened systems, but you might want a better pump...