Require a new seal assembly for your hot tub pump ? We carry a great selection of pool and hot tub seals from Good, Better and Best. Buna with plastic are standard grade which are good for low temperature such as pool applications. Buna with carbon offers better chemical resistance and are ideal for Hot Water Applications. Want the best for only a few dollars more ? Viton with carbon is the best choice for ozone and salt water applications with improved resistance to heat and chemicals.