It should be safe. ABS is Acrylonitrile-Butadiene-Styrene
It's not as resilient as pvc, but would not be toxic.

Wayne Sallee
Wayne's Pets



George Patterson wrote on 9/12/2006 10:53 PM:
I need to make some siphons and discharges for two pumps I bought.
Regular PVC is white and looks a bit gaudy. ABS is black and hides well,
but I haven't found small stuff (1/2"). I also don't know how safe it is
for marine tanks. The best stuff available seems to be the grey schedule
80 PVC. Any other ideas? I'm in the U.S.

George Patterson
Coffee is only a way of stealing time that should by rights belong to
your slightly older self.