Being an old pilot...I like redundancy. I have no idea if this is even possible. How do you set up a #2 bilge pump to work in tandem with #1....splice to #1 wiring and put a "T" on the water exit hose? If #1 dies, will #2 keep running? Potential fuse problem? Years ago, my single pump went out and lucky I noticed with only 4 inches of water in bilge coming down the mast foot after a 5" rain deluge. Excess water in the bilge freaks me out!