I do a lot of engine work (change manifolds, water pumps, timing belts, etc.) and it saves a lot of time! It also has the added benefit of being able to see if you have any leaks before refilling it with coolant (as long as it holds a vacuum you're fine!). No more adding, burping and spilling. A hose uses a venturi effect with your air compressor to pull the system under vacuum, then you close the valve, disconnect the hose and install the inflation hose. Submerge the charge hose in a jug of coolant and open the valve to allow coolant into the system. When the level nears the end of the hose, close the valve, pour a new gallon into the hose and continue loading. Works perfectly! The only downside is that sometimes it's not easy to tighten the clamps (as instructed in the instructions, DO NOT grab the gauge), but since you're pulling vacuum, not pressure, it doesn't need to be too tight anyway. Used it at my buddy's shop and all he could say was "wow".
Enhanced Elitech ILD-300 Infrared Refrigerant Leak Detector: Advanced HVAC Halogen Tester with Selectable Gas Functionality
9 Review
💪 Enhanced Universal R134A Valve Core Remover/Installer by Mastercool (81290)
9 Review
Lichamp Automotive R1234YF Installer Standard
9 Review
Robust Robinair (RG3) Portable Refrigerant Recovery Machine, 115V, 60Hz -Efficiently Recovers Liquid and Vapor Refrigerant
9 Review
Xiaomi Mijia Ratchet Screwdriver 16 in 1 Screwdriver with Interchangeable Bits, 10 pcs, Black
22 Review
Tool set Ombra OMT82S12, 82 pcs, brown
22 Review
Bit and socket set Stels Tool set, 1/2", 1/4", CrV, plastic case 94 pcs, Stels, 94 pcs, black
46 Review
Reversible Mi 16-in-1 Ratchet Screwdriver
21 Review