8MILELAKE 21pcs Handheld Vacuum Pump Set Tester Compatible for Automotive with Adapters Brake Bleeder Test Kit

This vac kit worked well to bleed my brakes. The only issue is the fittings do not seal properly so they'll allow air to get sucked into the line, making you think you may still have air in the system when in fact you don't. It helped to have a second person to still pump the brakes while using this.

An okay unit. A great and versatile tool to augment a collection if used carefully. Can be used to pump fluid backwards through a system (like front motorcycle brake), check 2 stroke crankcases, boat out-drives, etc... Not the best vacuum pump, but sufficient for extraction of fluid. First unit only generated -15in lbs, the second replacement was better making -19in lbs @ 5,500 ft. Requires much more squeezing actions for vacuum setting than the other type of bleeder pumps. Pressure in other mode builds super fast. Much more difficult to squeeze handle than expected (vs a solo vac pump), and handles extend so far, they are very uncomfortable for small hands, but usable.Handles are steal and coated with a nice grip. Body (red) is aluminum, plunger inside is steal with an o-ring to seal, nozzle is chromed steal, the gauge has a rubber surround and is glued in for sealing, do not remove the gauge (I thought there was nothing sealing the threads, and maybe this was contributing to my lower vacuum reading) The only plastic bits inside the pump are the check valves. The rubber bellows on the first pair had already started to separate at their joints when packing the return, the unit never experienced any sort of fluid, not that upsetting frankly.Holds vacuum and pressure readings for a half hour or more. Can be switched from Vacuum to pressure and the reading will only drop a pound during the transition, and continues to hold (you could can slowly modulate the release of vacuum or pressure by setting the pump to the opposite setting and squeezing the handles) Both units generated 40psi pressure no problem. The resolution of the vacuum side of the gauge is tiny, but usable (using only an 1/8th of the gauge face). Gauge was accurate. As with any of these things, getting brake fluid inside the pump is a no no. It will be ruined instantly. I use one or two lawnmower fuel filters before the pump when doing things with fluid of any type, in case I breach. You can reduce the chance of sucking fluid in the pump by putting the longest hose in the lid of the case, inside the collection cup, this is also how you would push fluid out of the cup.The case is nice (no smell), all the various nozzles will stay in the lid, but accessory's fall out easy, but will actually stay. The black fittings are a soft rubber, and I found them more useful than the hard plastic ones I got in kits from the past. I have not put them in brake fluid, I am keeping them for vacuum testing. The suppleness will provide a better seal. I would clean everything with orange based de-greaser immediately after use, especially if transferring brake fluid. (use defined as approx less than 1hr exposure)With the $55 I saved I could buy another hand vacuum pump (approx $21) for high vacuum diagnosis and a specifically built pneumatic brake fluid bleeder (approx $34) and have a more proper collection to reference during repairs.The manual would actually be very helpful to a newbie, but all illustrations of a vacuum reading show the gauge needle in the pressure zone FYI. The technical information seems correct.Happy Day!

Used this for pressure testing lower unit gear case on an Evinrude 70 hp. Worked fine for this purpose, haven’t used for vacuum testing or bleeding brakes.There may be some (very little) bleed off, tested at 10psi and it bleed down to 8 after about 10 minutes. This most likely at the hose at one of the connections, or the piece used to screw in at the housing, did not use hose clamps or seal threads on either gauge nor where screwed into housing. Quite sure if I did take those measures there would be no leakage at all.If the case was made with better closing hasps would be perfect, the flip tabs on all othe cases I have, have broken. Craftsman use to make a case where there was a sliding hasp, which I have had that case now for about 30 years and no broken hasp.

Tested properly for my IWE test but IWE's were bad; left wondering where leak actually is.

Not bad for the price. Sturdy construction. Durability so far is OK.