Designed To Maximize Safety & Minimize Risk. At Wechsler, when it comes to safety and the design of our products, we make no compromises. Our PumpGuard products follow this principle by thorough, no-compromises engineering, and using the time-proven concept of multiple layers of protection: Prevention: Our Dual Guard housing (patent pending) directs motor cooling air across the pump mechanical seal housing, to reduce the seal operating temperature, thereby preventing prematur