Add to Cart Quick view Shaft Seal, PS-1905, 5/8" Shaft, Silicon Carbide PS-1000 (BEST) fits Most Waterway Tubs MSRP: $121.23 Now: $97.36 Was: This part is a (BEST) Silicon Carbide Salt Resistant Verison of a PS-1000 Seal. NOTE: This Seal does not fit a Waterway Viper or EX2 Wet End.. Silicon Carbide’s exceptional wear and chemic