Black tank overboard discharge....

Jun 4, 2024
27
Hunter Legend 35.5 Charleston SC
Does anyone have a padlock on their overboard discharge valve? I thought that was a Coast Guard requirement. Our new to us Legend 35.5 doesn't have any provision to lock the valve, and no Y valve either. Just curious what every other 35.5 has....
 
Jun 21, 2004
2,658
Beneteau 343 Slidell, LA
That’s a bit unusual, because my 1988 Hunter had a Y that was lockable. My present boat also has a Y valve that I lock. Also have a MSD discharge protocol that I keep on board, as recommended by Coast Guard Auxiliary.
 
Jun 8, 2004
2,909
Catalina 320 Dana Point
No, I have both a macerator from the tank or a Y valve for direct overboard discharge both with thru hulls normally closed but not locked. I have had a CG Aux. safety inspection and a "boarding" without comment from either. Don't remember if dockside inspector even looked and I know the "boarding" team didn't. In fact, the boarding team didn't leave their boat, just followed along and had me hold stuff up. They even cut me a little slack on expired flares.
 

jssailem

SBO Weather and Forecasting Forum Jim & John
Oct 22, 2014
22,161
CAL 35 Cruiser #21 moored EVERETT WA
I have had the CG aboard for inspection. The through hull had a zip tie restraining the movement of the handle. The pump was disconnected from the DC power. The inspector stated all was good. The zip tie was adequate. The lack of pump working was like a belt and suspenders approach.
 
Dec 25, 2000
5,861
Hunter Passage 42 Shelter Bay, WA
No lock, no zip tie either. In our case, the CG inspector just looked at the valve and saw that it was closed. No problem. I suppose you could remove the handle, if that would help in your situation.
 
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Sep 30, 2016
357
Island Packet IP 44 Ventura, CA
How can you have an "accidental" discharge? On my boat I have to lay down on the sole, pull a cover up, turn two valves and turn on the pump. If I discharge the tank its intentional. I know some boats are rigged to be much easier, but still. Locks seem like overkill.
 
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jssailem

SBO Weather and Forecasting Forum Jim & John
Oct 22, 2014
22,161
CAL 35 Cruiser #21 moored EVERETT WA
Locks seem like overkill.
They are overkill. That is just what some desire to stop the boaters from dumping in the water.
I've seen the cloud:poop: left behind a Grey Whale that has been feeding. I would never follow a whale in a boat. You talk about polluted water.
 
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Mika1

.
Nov 2, 2017
16
Hunter Legend 37.5 Space Coast FL
There is nothing to attach a zip tie to either....
I used 5200 to glue a small padeye to the hull just below the handle of the discharge seacock. It doesn't need to be structural, it's only an attachment point for a zip tie to satisfy the regulations. Locate the padeye directly under the seacock handle to protect it from bumps.

FYI, I also have a toggle switch wired in next to the macerator pump. This is in addition to the (normally off) "Macerator" circuit breaker on the electrical panel. Combined, it all makes accidental overboard discharge impossible because three deliberate actions are required: activation at the electrical panel, unlocking/opening the seacock in the transom, activation of the pump's switch in the transom. I believe the regs only require two.
 

JBP-PA

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Apr 29, 2022
481
Jeanneau Tonic 23 Erie, PA
...and no Y valve either.
Are you saying you don't have any Y-valve at all? It is always direct overboard? Or always direct to tank? Many Great Lakes boats are always direct to tank with no overboard discharge.
 

Mika1

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Nov 2, 2017
16
Hunter Legend 37.5 Space Coast FL
Correct, I have no Y valve at all. The hose goes directly from the head to the tank. Then the tank (which is plastic, indicating a previous owner replaced it) has two discharge fittings. One goes to the macerator and the other to the deck pumpout. Oh yeah, the tank has a vent fitting also.
But yeah, the bottom line is everything goes to the tank.
 
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Jun 2, 2004
3,449
Hunter 23.5 Fort Walton Yacht Club, Florida
Couple other options:
If the access to the valve can be secured that would be acceptable
Removing the handle is also acceptable

The object is to prevent an accidental or inadvertent turn
 
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JBP-PA

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Apr 29, 2022
481
Jeanneau Tonic 23 Erie, PA
Correct, I have no Y valve at all. The hose goes directly from the head to the tank. Then the tank (which is plastic, indicating a previous owner replaced it) has two discharge fittings. One goes to the macerator and the other to the deck pumpout. Oh yeah, the tank has a vent fitting also.
But yeah, the bottom line is everything goes to the tank.
Right. So you need to disable the maceration discharge so that it cannot be accidentally used in NDZ waters. If there is a shutoff valve, I think securing it in the closed position with a zip tie would be acceptable. Otherwise you would probably need to disconnect the wires or add in a safety interlock switch that can be secured against someone simply turning it on.
 
Jul 27, 2011
5,109
Bavaria 38E Alamitos Bay
It’s hard to imagine an “accidental” discharge unless the thru-hull valve was left open “accidentally”, in that “I ‘accidentally’ forgot to close (and tie) it” when we got within 3 n.mi. of shore. I think they want the thing (valve handle) locked closed so if you are about to be boarded you cannot pop below to quickly close AND lock it if open illegally. Putting on a zip tie that’s secure would take a few minutes, etc. That’s assuming the CG really wants to catch you in violation in the first place, which I sometimes doubt.:doh: Has anyone here ever been cited for an open or “unlocked” discharge valve? The last time a coastie was aboard the valves were closed but not tied. I was advised to zip tie ‘em as they left. Think of it. If you’re at the Island and need to dump, go out 3 n.mi., snip off the zip tie, open the valve, discharge, close the valve, attach new zip tie, and then return. Do that again in two or three days.
 
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Jul 27, 2011
5,109
Bavaria 38E Alamitos Bay
Probably okay. I don't think there are any coast guard regs about direct discharge.
True. There is none.

A study of a few years ago reported that the chief source of enteric bacteria in Southern California coastal waters was bird (suspect gulls) poop.:poop: Not whales, sea lions or people, etc. Marine scientists are still trying to figure the general viability of enteric bacteria (E. coli) in seawater. It can live for a while, divide, but not form colonies. You’ll get sicker eating contamiated lettuce than swallowing a little seawater, likely. Also, there are many species out there that feed on bacteria.

The federal regs perhaps ought to be, IMO, no discharge shoreward of demarcation, or within established mooring fields, such as at Avalon, rather than go beyond 3 n.mi. That’s clearly an arbitrary boundary ecologically speaking. Likely, it’s an enforcement boundary. Remember, “Follow the science?” What science? Are we talking unhealthful or simply disgusting regarding seawater discharge of “sewage” from recreational water craft. Discharge via your boat’s head comes out as “sewage” definitionally b/c it is carried through a drain or pipe. If you go in a bucket then dump it’s technically not “sewage” in that urban sense which is evidently applied to boats. :( However it gets into the water, it would be the same amount of bacteria. So, in terms of unhealthful exposure or impact, what’s the difference?:doh:
 
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JBP-PA

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Apr 29, 2022
481
Jeanneau Tonic 23 Erie, PA
It’s hard to imagine an “accidental” discharge unless the thru-hull valve was left open “accidentally”, in that “I ‘accidentally’ forgot to close (and tie) it” when we got within 3 n.mi. of shore. I think they want the thing (valve handle) locked closed so if you are about to be boarded you cannot pop below to quickly close AND lock it if open illegally. Putting on a zip tie that’s secure would take a few minutes, etc. That’s assuming the CG really wants to catch you in violation in the first place, which I sometimes doubt.:doh: Has anyone here ever been cited for an open or “unlocked” discharge valve? The last time a coastie was aboard, the valves were closed but not tied. I was advised to zip tie ‘em as they left. Think of it. If you’re at the Island and need to dump, go out 3 n.mi., snip off the zip tie, open the valve, discharge, close the valve, attach new zip tie, and then return. Do that again in two or three days.
If someone wants to deliberately violate the NDZ law there is really nothing the CG can do unless they catch you in the act. It's really more of an honor system.

Does the zip-tying law stop people from accidentally doing it or stop people doing it deliberately because it is a hassle to cut and replace the zip-ties? I don't know, I'm on Lake Erie.
 
Jul 27, 2011
5,109
Bavaria 38E Alamitos Bay
If someone wants to deliberately violate the NDZ law there is really nothing the CG can do unless they catch you in the act. It's really more of an honor system.

Does the zip-tying law stop people from accidentally doing it or stop people doing it deliberately because it is a hassle to cut and replace the zip-ties? I don't know, I'm on Lake Erie.
The ties are irrelevant as to do or not to do. If you are not discharging illegally, you do not need to rotate through zip ties to stop you from doing what you are not doing already. Someone does not “accidentally” open a tru-hull valve to discharge. If you are discharging illegally where the valves are open, or being opened to discharge then closed but not tied, it’s hard “prove” if not tied, that it was not open to discharge a few minutes earlier, etc., than when inspected. As you say, the law is hardly enforceable most of the time.
 
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