Bulkheads : PVC or ABS?
 

i have a black bulkhead purchased from golds and was wondering what these things are- PVC or ABS? just want to be sure before i go screwing it up with glue

Most likely pvc, the ones i bought there were pvc, burn some if it goes up like crazy its abs :)

Do you have to glue it Neil (threaded/ non threaded)? I don't glue the threaded variety.

there is one that will have to be glued- the rest are threaded.

It's probably ABS- mine were.

If you need to glue one to the other ,you can use ''transition glue''.You might have to go to a plumbing supply place .

You can get PVC to ABS glue at Home Depot or Rona. It's next to the PVC glue and primer.

Bingo- ABS

Black is usually ABS white and Grey are PVC

If it is ABS they are not rated for potable water, you should be using PVC fittings for aquariums.