Does it bleed air from the ABS module as well

There are two types of ABS modules. An OPEN and CLOSED type system. An OPEN system will allow you to bleed the brake system and ABS module as normal since it's an OPEN sytem and the fluid flushes right through. A CLOSED system on the other hand requires a separate bleeding procedure in order to open up the internal solenoid valves to allow the brake fluid to flush through. This process is more involved and requires additional tooling or procedures to accomplish. See vehicle manufacturers service manual for instructions. Ok so now you want to know if you have an OPEN or CLOSED ABS module. Best way to find out is go to your vehicles manufacturer service manual and see what the final steps are after replacing a brake caliper, master cylinder, ABS module or any brake system component that you need to open up the system. At the end of any procedure I mentioned it will tell you to bleed the brake system. If no mention of a special procedure to bleed the ABS module separately then it's safe to say you have an OPEN system. Most newer vehicles today have an open system for ease of bleeding and flushing. I believe early ABS systems were a CLOSED system but I'm sure there are some late model vehicles that still have a CLOSED system. Ok, that's the short version. Hope this helps.

What is the typical pressure used to pressurize the master cylinder? 10psi? 20psi?

We use 10psi . We have also used 20 but I personally found no difference. The unit does produce alot bubbles in the pressure line line so we use 10 psi to minimize the bubbles.

you need an air compressor....if memory serves the compressor needs to be 5SCFM minimum but check the Mityvac website. You attached the mityvac to each bleed nipple in turn and just open the nipple enough to start fluid being extracted into the Mityvac. It worked well for me, I'd tried other methods of purging the lines but this worked best.

does anyone know how to use the mva801 adapter? its just a cap with no fittings

It is used on dual cap master cylinders. You use that to cap off the other side of the mastercylinder. Factory mastercylidee caps do not hold, not are they meant to, pressure. Therefore if you just left the factory cap on the brake fluid would fill the reservoir and start leaking out

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🚗💨 Bleed brakes like a pro—fast, clean, and unstoppable!

RAPID FLUID EXTRACTION - Bleeds up to 2 quarts per minute for lightning-fast brake maintenance.
SMART RESERVOIR DESIGN - 1.9-quart capacity with automatic shutoff prevents spills and overfills for mess-free service.
CONTINUOUS OPERATION CLAMP ON - Clamp-on refill bottle keeps you going without interruption—no more stops to refill.
UNIVERSAL VEHICLE COMPATIBILITY - Perfect for cars, trucks, motorcycles, ATVs, and more—your all-in-one hydraulic bleeding solution.
PRECISION CONTROL MANEUVERABILITY - Variable thumb throttle and 360-degree swivel air inlet let you work precisely in tight spots.

The Mityvac MV6835 Vacuum Brake Bleeding Kit is a professional-grade pneumatic tool designed to efficiently bleed brake and clutch systems across a wide range of vehicles. Featuring a rapid 2-quart per minute bleed rate, a clamp-on auto-refill bottle for continuous operation, and a 1.9-quart reservoir with automatic shutoff, it ensures fast, precise, and mess-free hydraulic maintenance. Its variable pressure control and 360-degree swivel air inlet provide exceptional maneuverability, making it an essential tool for mechanics and DIY enthusiasts aiming for flawless brake service.

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Manufacturer	Lincoln
Brand	Mityvac
Model	Vacuum Brake Bleed Kit, 11-1/2 in. L
Product Dimensions	32.26 x 25.4 x 22.56 cm; 2.18 kg
Item model number	MV6835
Exterior	Smooth
Manufacturer Part Number	MV6835
Material	HAWA
Colour	White, Black
Assembly Required	No
Special Features	automatic
Manufacturer	Lincoln
Item Weight	2 kg 180 g

Mityvac MV6835 Vacuum Brake Bleeding Kit

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