Combining oil and carbon filters, this is an original design by Tim Rider to protect your vacuum pump and keep it running clean. This is not like the other "pump saver" designs you might have seen before, this actually filters under a vacuum.
When bubbles pop, particulates are atomized and become airborn. The old "pump saver" options might be good for overflow, but won't keep your pump running clean as they offer no filtration at all. We've been running these pumps in our shop and the difference is amazing! Our pumps have gone from a 3 month duty cycle before having to be torn down for cleaning. Since putting these filters on our systems, all we ever have to do is keep the oil changed somewhat regularly.