I am considering fitting non return valves to both my cockpit scuppers as on occasions in rough conditions I am getting water flowing back into the cockpit. The cockpit is deep, and about one foot above the water line. A life -raft is fitted in a cockpit :unsure: locker, so I could get salt water flowing around the bottom.

Any reasons NOT to fit this?

Dick thanks for your reply. I have tried to source non return valves but they only seem to go to a max. of 1 .5 inches so little progress. I will try to measure the water flow when back on land later this year before any further action.