Simpson Pressure Washer Pump Guard Cleaning Solution (88266) lubricates pistons and seals to protect your pressure washer pump while in storage. Utilizing Pump Guard on your pressure washer pump will help to maximize the life of your machine. Simpson recommends that you use Pump Guard Cleaning Solution when your pressure washer is going to be stored and unused for a period of time. This product is a replacement for Simpson Pump Guard 80130, and is manufactured to be compatible with either gas or electric pressure washers.