NOT a problem using purple primer/ pvc glue,
about three months ago I did all the plumbing on my tank with all the above, let it seat for short period and your finished.
one thing I did stupid was that I wanted to see if it was air tight so I blew into one of the pipes""""""""" never do that , the fumes where like sucking the exhaust of a car . yes aleast run water thru it. Remember the glue sets fast so do all the cutting and fitting first , then glue the whole set up.
90gal glass -1' bulkheads /1/2 returns 20gal sump
also use ball valves if you want they came in handy.
PS I own a hardware store so plumbing is a good dept in my store, feel free to ask any other plumbing questions
good luck
Don LI/NY
