Prevent backflow and back-siphonage into potable water with a Zurn AquaSpec® elevated atmospheric vacuum breaker. The elevated vacuum breaker (Part no. Z80000-XL-EVB) works with faucets to keep drinking water from becoming contaminated. Its exterior is lead-free, heavy-duty cast brass with a polished chrome-plated finish. AquaSpec® faucet valves contain a unique, heavy-duty quarter-turn ceramic disc cartridge. The cartridge is so durable, you can expect it to last up to one million cycles. When you need a replacement part for repair or maintenance of a flush valve, trust Zurn for genuine, reliable parts.