Quote: (Originally Posted by zbskii)
Has anybody tried sticking some kind of hydrophobic membranes over the loop mushroom valves?
Yes, done it for the SK since it is the easier to test.
Used the same material in the rod pod (i.e. 1.5" diameter) and on top of the scrubber entrance (i.e. 4" diameter).
The WOB difference between the 2 locations was exponential. I can't even able to pull a breath comfortably with the smaller diameter in 1-meter of pool water.
When changed to the larger location, the WOB was much less but still noticeable. At the end, I used neither.
If you are going to use any kind of hydrophobic membrane in the unit, I would suggest fitting it in the largest diameter location to give as much surface for the air to go thru as possible.