Tetra Pond DHP3600 is a debris-handling pump for ponds up to 3000 gallons. The DHP"s impeller design allows it to resist blockage and pass 1/4 debris without clogging the pump. Clean your pond- not your pump. These pumps are energy efficient and are capable of powering filters waterfalls and streams. They are also oil-free so they will not contaminate aquatic life. For maximum flow use 1 1/2" ID tubing. Also fits 1 1/4" ID tubing. UL Listed and includes a 3-year limited warranty."