The Mudcat Café TM
Thread #92381   Message #1764948
Posted By: JohnInKansas
20-Jun-06 - 04:48 PM
Thread Name: BS: Rainbow Vacuums
Subject: RE: BS: Rainbow Vacuums

Our old RexAir had a painted line on the inside of the lower tank to mark the level of the water you should put in at the start. On old ones, sometimes the mark wore off, but a close inspection might show a trace of it. I vaguely recall (I think) seeing a "new model" sometime around 1955 or so with a stainless steel tank that had an embossed "crease" for the water level. Any marking that looks intentional on the inside of the tank probably is meant to indicate the starting water level.

If you can't find a mark, about half full, or a little less, would be a good starting point. If dirt gets through add water. If it spits droplets out the exhaust it may be a bit too full, although it's normal for the exhaust to be "moist."

The unit that sits on top of the tank probably has a "cap" with slits in it(details may be different?) on the end of the motor shaft that acts as a centrifugal fan to sling air outward so the water is sucked up at the center and flung out, giving a "toroidal" circulation in the tank. That's what keeps the mist up to trap the dirt. The water should not quite touch the "slinger" when the vac is turned off; but has to be close enough to get some pickup. Anything around 3/8 to 3/4+ inch between the bottom of the slinger and the top of the water (with the vac off) should probably work ok.

Note that it's normal for the exhaust air to be "damp," and the old Rexair instructions suggested adding a dab of mentholatum to the water to "humidify" sick rooms with a pleasant smell (early aromatherapy?). Frequent and/or extended running in small areas can significantly raise the humidity.

The RexAir recommendation was just to dump the dirt in the toilet. We never experienced any problems doing that, since the crud gets pretty well macerated by circulation in the tank; but we didn't have indoor cats and I didn't wear my hair as long back then (our current sources of killer furballs).

I have more problems with my current drains due to the predatory Wisteria in the back yard, so I might pick an inconspicuous spot to dump, let the water run off/seep out, and rake up when the pile is big enough; or use a bucket with a hole/screen in the bottom to collect the solids that are picked up for disposal(?). If you're on a septic system you might also be a bit more concerned about putting an additional dirt burden in, although "way back then" I knew a couple of people who were on "private systems" and just dumped theirs in the drain.