holding tank need to be closed in marina?

[Sailmonkey]

Originally Posted by rwidman

I'm confused on how you close a holding tank. And on where the poop goes if the holding tank is somehow closed.

I’m working on the assumption that the OP’s tank is gravity drain

[Sailmonkey]

Originally Posted by rwidman

I never heard of that so thanks for the explanation. I'm not sure that would be entirely legal in the USA.

It is 100% legal in the US if there is a provision for a deck pumpout ( may not be legal for inland waters though).

[KadeyKrogen38]

I switched to composting head no plumbing, no tanks, no smell. Except for emptying the urine tank two adults can use for month on one charge of compost. Then you can simply store in large container or place on regular trash or flower beds

[lsearite]

Originally Posted by Aden

We are sailing along Spain coast and then Canary islands. Do we need to close the holding tank when docking boat in the marinas in Spain, Portugal or canary islands? Having looked at the sailing guide book, we can't find this holding tank information on the book.

We always close it in marina and then open it in the ocean. Sometimes, it gets a bit messy in the head.

Do they have pump out stations?

[atoll]

Originally Posted by lsearite

Do they have pump out stations?

few and far between,and most don't work anyway

[Aquadome]

Originally Posted by Sailmonkey

There’s something horribly wrong with your holding tank if being full allows it to overflow into the head compartment!

But, anytime your in an enclosed body of water, the holding tank should be utilized. Even if there is no pumpout available, keep the holding tank active until you leave the marina or, worst case, empty only on a falling tide.

I CANT BELIEVE THIS. NEVER EMPTY YOUR HOLDING TANK IN A MARINA OR WITHIN 3 MILES OF THE SHORELINE.

[rwidman]

Originally Posted by DumnMad

Most heads are fitted with a mascerator so no lumps and a quick dispersion and kill off of the harmful bacteria. As atoll says, the fish enjoy it.

If you are saying the actual toilet has a macerator, that's not correct. Manual toilets do not have macerators.

A holding tank that empties by gravity doesn't have a macerator either.

[atoll]

Originally Posted by Aquadome

I CANT BELIEVE THIS. NEVER EMPTY YOUR HOLDING TANK IN A MARINA OR WITHIN 3 MILES OF THE SHORELINE.

what are the fish going to eat then

[Aquadome]

Originally Posted by atoll

what are the fish going to eat then

Hmm why are fish healthy ... no carbs they eat fish

[atoll]

Originally Posted by Aquadome

Hmm why are fish healthy ... no carbs they eat fish

many fish are vegetarian , scavengers or bottom feeders....
harbour mullet will eat any thing ....bigger fish eat them,then you eat the bigger fish,then have a crap in the marina...food chain explained!

what do you think farmed prawns eat from se asia

[FlyingScot]

Originally Posted by atoll

FYI this is the same system submarines use underwater,only difference is compressed air forced in from the top is used to empty the tank instead of gravity.

Tridents, and presumably all modern submarines have '**** pumps' to pump out black tanks. Positive displacement piston pumps. Did it many times. Back pressure on the pump was easy to convert to ships depth.

Gray tanks were pumped with large impeller pumps.

We had two **** pumps on board, one fore and one aft. Had to take them apart a few times.

[atoll]

Originally Posted by FlyingScot

Tridents, and presumably all modern submarines have '**** pumps' to pump out black tanks. Positive displacement piston pumps. Did it many times. Back pressure on the pump was easy to convert to ships depth.

Gray tanks were pumped with large impeller pumps.

We had two **** pumps on board, one fore and one aft. Had to take them apart a few times.

i should have said this was the original system on submarines,before the generation of modern deep diving subs,where pressure threshold was greatly increased as they were able to dive deeper,hence mechanical pumps.

[Aquadome]

Originally Posted by atoll

many fish are vegetarian , scavengers or bottom feeders....
harbour mullet will eat any thing ....bigger fish eat them,then you eat the bigger fish,then have a crap in the marina...food chain explained!

what do you think farmed prawns eat from se asia

Sheesh it was a joke

[atoll]

Originally Posted by Aquadome

Sheesh it was a joke

no offense taken,hence the nochalant emo in the post

[Sailmonkey]

Originally Posted by Aquadome

I CANT BELIEVE THIS. NEVER EMPTY YOUR HOLDING TANK IN A MARINA OR WITHIN 3 MILES OF THE SHORELINE.

What about the parts of the world where boats have no holding tanks and getting three miles from land takes a day of motoring?