"Roger Long" wrote:

Now, why didn't I think of that?

It's great when someone who actually knows what they are talking about
shows up.

I just went through Calder's section on head plumbing and it sounds
like a lot of the greater odor of salt water flush over fresh is not
the salt but all the plant and animal stuff that comes in. A strainer
in the intake line sounds important.

I don't think you can really strain out the stuff - it's plankton
sized.

We used freshwater flush before we got the LectraSan(1) (or when the
output has to go to the holding tank), and there's an even easier way
if it works for you. Our shower is in the head, and we just take the
shower head down and flush with water from the shower. No need to do
anything to the thru-hulls, or anything else.

(1) LectraSan of course needs the salt from the salt water.

grandma Rosalie