US Seal Shaft Seal [PS 671 3 8" Shaft Buna] (PS 671) gentekk The Waterway 672 2510 round gunite The Waterway 672 2510 round gunite main drain sump body is designed for compatible 8 inch drain applications using a 2 inch slip connection A titanium heater element is useful because it provides the actual heat producing function inside the assembly while offering a material choice that many buyers prefer for supported environments US Seal Shaft Seal [PS 671 3 8" Shaft Buna] (PS 671) is a replacement pump shaft seal from US Seal Manufacturing This part is intended for repair situations where the existing seal specification and part number match the pump being serviced