Thank you for the information. I can't wait to take a look at the underside/backside of the boat in the lift this weekend and start poking around to figure out how everything is run and where all of the various pumps are located. I am treating the situation as a blessing. In 2010 when the pumps were installed they were all 750 GPH. I am taking this opportunity to upgrade each "empty" pump for my rear locker V-Drive bags on each side of the engine from Johnson 750 GPH to Attwood Tsunami 1200 GPH pumps. I may revisit the "fill" pumps in the off season and upgrade those so they fill quicker as well.