Review on Attwood 4620 6 Tsunami Replacement Cartridge by Jerimiah Augustine

My boat comes with one of these and has lasted 9 years in salt water. It has survived multiple float switches! Replacing the cartridge is very easy and the O-ring is pre-lubricated with silicone grease. It's worth noting that this replacement looked and fit the same as the original pump despite being almost ten years apart. The 500 gph and 800 gph pumps are good for pumping rainwater or the occasional ripple out of the bilge. But these pumps are unable to cope with the waves washing the bow in rough water. I ended up installing a 3800gph pump separately as an "emergency" bilge pump in case things went bad. It never hurts to have a second bilge pump as a backup. For smaller boats up to 15ft some T800 sizes should be great. For something bigger, consider upgrading to a much larger pump. But I use the smaller T800 pump as my "main" bilge pump as a first line of defense to keep things dry.