The sump installed back aft. The green pipes will drain the water from the deck into the sump. There will be a float switch inside that triggers a macerator to pump it dry. This will eliminate having freeing ports in the transom which could allow water to come in when you have a couple guys working a fish around the transom. Remember, this is still only an 18' boat and the sole is only 4" above the waterline. It is really hard to do a good self bailing sole in a boat this size.

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