This T Pump replacement for the Python No Spill Clean and Fill Gravel Cleaner system draws water from the faucet to create the suction you'll need for proper siphoning. An adjustable valve with "drain" and "fill" positions makes the process simple and intuitive.Replacement part for Python No Fill Clean and Fill Gravel CleanerDraws water from faucet to allow siphoningGenuine manufacturer replacement partNote: Must be used in conjunction with a plastic or brass faucet adapter (sold separately).