Ivan Vegvary wrote:

It's 3" ABS so it does not weigh that much. However, does no one make a
support system that installs within the wall (as opposed to supporting it
from below)?

I know that I can wrap it with 'plumbers tape' and nail the tape ends to my
studs. Easy to do where you can get a bite because of a fitting. How about
mid-length? It would be easy if they made a 'glue-on' (ABS) quarter circle
with floppy straps that could be nailed to the studs.

Checked with both box stores and ACE. Nobody knows of a better way to
support stack than to simply wrap it tightly with the metal plumbers tape.

Any other ideas? Thanks god it isn't cast iron.

Thanks,
Ivan Vegvary

Use one of the rubber and hose clamp "fernco" type couplings to hold the
pipe. Put the plumbers tape under the hose clamps and on top of the
rubber section. Obviously slit the rubber section and undo the hose
clamps so you can assemble it on the pipe mid span.