The Whale 650 is a reverse-engineered copy of an early prototype of the Rule LoPro LP900. Rule came up with the idea for the low profile pump and showed it around at some industry trade shows. Unfortunately, the folks over at Whale saw it and decided they better do one too. Whale rushed theirs to market, while Rule hit some technical snags and was delayed. The result is that Whale went to market with a pump that LOOKS a lot like the Rule, but doesn't offer the same features and reliability. Check out the Rule LP900 series pump. It is a 900gph pump, versus 650gph, the discharge fitting is adjustable a full 360 degrees around the pump body, and the automatic version (LP900S) has both an electrical diode water sensing mode as well as a resistance sensing mode. Meaning, if the water sensor proves unreliable, you can switch it to operate like the 25S you're all familiar with, which is to say it cycles on every two minutes to sense for resistance. If it senses resistance, it keeps pumping until the resistance is gone. If not, it shuts off immediately. This has proven to be the most reliable method for automatic bilge pump operation, but many people object to the fact that it creates a draw on the battery even when there is no water.
