I used the 'FLush King' type on my 2000 Infinity... Had a straight line back into the tank. Not sure how well it really worked based on some sample videos - but I had no complaints...
Fast forward to my 2014 Hurricane - which has a 'U' coming down from the black tank (comes out lower side - 90 degrees to vertical down for 8-12 inches - then 90 degrees back under the tank - to the 90 to vertical down to discharge.. Not a chance of getting water back into the tank with any force... I switched to the Tornado rinser - which uses a hole in tank to mount the rinser. Seems to work well so far.
Each unit is different - the wonderful 'it depends' answer.
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Greg
Not yet retired...
Florida (Michigan transplant)
2014 Hurricane 32A
2000 Infinity (previous)
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