Check valves on thruhulls?

[backman]

I was messing w. the hoses on the macerator today, made an oops and realized I had open ocean 2" below the now disconnected macerator thruhull.

I fixed the problem which led to the mental question as to whether the various waterline outflow hoses - macerators; head bilge - have check valves.

Anyone know?

[CClassic28]

Almost certain the answer is no. I have seen while drifting & rolling a fair amount of water exit those thru hulls when she rises up & out.

Chris