Due to availability and vanity, I selected ABS tees for my patio drain inlets ref: the drawing below. PVC 4x3 tees don't seem to be available, and I figured that a black ABS interior under my brass drain grates would have a nicer appearance than bright white PVC.
...but then I get to worrying about ABS's ultraviolet resistance (or lack thereof)...
Should I just quit worrying? Is sun shining through the drain grates enough to degrade the ABS risers over the years? Options include a quick coat of UV-resistant spray paint on the riser pipe's interior, or locating some DWV PVC with the black interior (though I'm not sure where I'd find that locally, in the small quantity I need).
Also, it seems obvious to me that ABS fittings (in this case, the Tee and end cap) are not constructed of the same cellular core material that straight ABS pipe of made of. My assumption is these are hearty plastic with better UV resistance than the pipe, yet I can't locate any manufacturer data noting the difference.
I've got an email in to an ABS manufacturer; if I get a reply, I'll share it here. Curious to hear any of your thoughts on the matter.
...but then I get to worrying about ABS's ultraviolet resistance (or lack thereof)...
Should I just quit worrying? Is sun shining through the drain grates enough to degrade the ABS risers over the years? Options include a quick coat of UV-resistant spray paint on the riser pipe's interior, or locating some DWV PVC with the black interior (though I'm not sure where I'd find that locally, in the small quantity I need).
Also, it seems obvious to me that ABS fittings (in this case, the Tee and end cap) are not constructed of the same cellular core material that straight ABS pipe of made of. My assumption is these are hearty plastic with better UV resistance than the pipe, yet I can't locate any manufacturer data noting the difference.
I've got an email in to an ABS manufacturer; if I get a reply, I'll share it here. Curious to hear any of your thoughts on the matter.