SIMPSON’s Pump Guard 88266 lubricates pistons and seals to protect your pressure washer pump while in storage. Utilizing a Pump Guard on your pressure washer pump will help to maximize the life of your machine. SIMPSON recommends that you use Pump Guard 88266 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.