This really isn't that tough, and google should be your friend.

I entered bulkhead fitting and got 454,000 hits. This one might even be
what you're looking for; http://www.truetex.com/bulkhead.htm.

Bulkhead fittings are usually made of various plastics and can be found
on-line or at swimming pool suppliers and some specialty plumbing supply
shops.
"Gareee©" wrote in message
...
"G Pearce" wrote in message
...

Hi Gary - Hal is right - Bulkhead fittings are the answer, for any
thickness of plastic or rubber, just make sure you tighten it - I use it
on 45 gal plastic barrels for bio-filters - no leaks - they come from
3/8" up to 2" and maybe larger - go to a farm supply store that has
supplies for sprayers for fields - up here in Canada a 2" fitting is
about $15 Can - smaller ones are less - I would never use pvc fittings
and any kind of glue - Bulkheads around here are used on up to 5000 gal
(and maybe larger) tanks with no problem - my filter has been running for
12 yrs - no leaks

Ok, so bulkhead fittings are metal? I have a farm supply store here,
(fortunately).. are they also available at Lowe's? I did something similar
with the toilet flanges.. I attached them from the inside, and used the
regualr wax seals for them. I added long bolts, and used LARGE washers on
each side, tighten down,. with silicon between them and the rubbermaid to
add just a little more seal to them. Those look to be working great.

I'll see if I can find the bulkhead fittings tomorrow if possible. If they
are heavy, might that be an issue for the plastic to support?

--
Gareee
(Gary Tabar Jr.)