Mi-T-M® AW-4070-0004 Pressure Washer Pump Saver Fluid, 16 OzPrevents harmful build up of hard water mineral deposits, preserves seals & packings. Prevents against pump damage due to freezing. Pump saver provides longer pump life, prevents harmful build up of hard water mineral deposits, preserves seals and pistons and protects against freezing for safe, cold weather storage. 16 Oz For use with all pressure washers Protects pressure washer when not in use Prevents harmful build up of hard water mineral deposits