Best Float Valves are the simplest, most durable valves available on the market today. They are versatile full-flow valves that are very clog-resistant. They work at pressures from less than 5psi up to 90psi standard, and up to 180psi with options. Our high volume valve is ideal for pond siphons. When necessary, washers are easily replaced and all parts are individually replaceable in the field. Best Float Valves are American made.