Quote:
Originally Posted by Msquared
I understand that, but that's what I though meant when you wrote: "The tanks like the Motiv set up are actually introducing air into your precious fluid." My reply was that they aren't introducing any more air than is already being introduced during the bleed/flush process anyway.
The humidity of air is about how much water the air can hold. It doesn't mean that water is going to somehow transfer into your brake fluid: it's already absorbed into the air! The only way this is going to hurt anything is if the water condenses and falls out of the air and into the brake fluid (consdensation). This is determined by the relative volume of the air at ambient vs a compressed state. But a Motiv bleeder doesn't operate at high enough pressures (15psi) to cause condensation. If it did, you'd literally see condensation droplets all over the inside walls of the jug, and that doesn't happen. OTOH, an air compressor that usually operates at over 100psi can cause condensation, and one only has to drain one's compressor tank to see that. That's why those professional systems need a bladder.
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Matt a hygroscopic material is a substance that absorbs moisture from the air. It really doesn’t matter, just keep flushing your fluid regularly and you should be ok. I’m out.