If your scupper is fine, why replace the whole thing? This scupper flapper repair kit has a 1-9/16" diameter black rubber flapper and black plastic retainer wedge to fit any scupper with a 1-1/2" flapper valve.
If you have another scupper, just measure the flapper and:
If it is 1-5/8" in diameter, you need Scupper Flapper Kit 56677.
If it is 1-3/4" in diameter, you need Scupper Flapper Kit PRE56555Flap.
If it is 1-7/16" in diameter, you need Scupper Flapper Kit PRE56553Flap.
If it is 2" in diameter, you need Scupper Flapper Kit PER0002.
If you don't see the flapper kit you need, click "Contact Us" and let us know what you need!