On Jul 31, 6:20*pm, Michael B wrote:
On Jul 28, 1:52*pm, kansascats wrote:

Does anyone just fac the intake side of these filters and keep using
for another few months?

Nothing wrong with having a 'prefilter'. Saw one a few days
ago, where a woman had made what amounted to a 'pillow
case' with a spot of Velcro on a flap. She just takes the filter
out, shakes to fuzz from the 'prefilter', puts it back together.

yea, but the prefilter is not pleated.. so you are restricting the air
quite a bit more than to have the pleated filter alone. The pleats
add many times more surface area. I experienced that on my shop vac.
I have a clearsteam pleated, that I wrapped in a vac bag, then I have
a bag for all the "stuff". When I pulled off my "wrap" around the
pleated filter the suction increased dramatically. Given that,
either the prefilter needs to be very porous (does not filter much) or
another pleated, or non existent.