Re: sinking
 

The old tubes were replaced with extra long bronze thru hull fittings with nuts and bedded in 5200 every one including boat drains in well I have rear deck up and live well full for a week and thats not dripping into hull, perhaps bow gets hung on bulkhead cuasing stern to sink ?

Re: sinking
 

Took tubes out glassed over went out transom with TH flaper succupers to flex pool hose 2bilge pumps high wateralarm so far happy

Re: sinking
 

are all the hatch to the bilge water tight?
Rain or water could have got in the bilge and if pumps could not keep up, the rear of the boat would lower and allows water to come in from the drain. More water would not fill the bilge.....cycle repeats.......boat flips