"Peggie Hall" writes:

What's to keep the screen from becoming clogged up, Lew? Tell me more
about this, 'cuz I'm having a hard time visualizing any screen in a
holding tank that wouldn't cause more problems than it solves.
snip

"Screen" may be a little bit of a misnomer.

Actually it is a 1/4" thick sheet of polypropylene with 1/4" dia holes on a
60 degree diamond pattern.

A very common coarse screening material in the chemical industry.

Anything that enters the pumpout lift tube has to get thru a 1/4" dia hole
first.

To paraphrase the story of the three bears, not to big, not to small, just
the right size for the job at hand.

HTH


--
Lew

S/A: Challenge, The Bullet Proof Boat, (Under Construction in the Southland)
Visit: http://home.earthlink.net/~lewhodgett for Pictures