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31-07-2016, 08:37
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#1
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Registered User
Join Date: Aug 2011
Posts: 99
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Septic tank question
On my hunter 380 i have a problem with the tank when i do a pump our nothing come out so the on;ly way to empty it its at sea with the macerator what can be wrong that nothing come out and what can i do to resolve the problem
thanks in advance
capt Michel
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31-07-2016, 08:40
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#2
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Registered User
Join Date: Nov 2013
Location: Nice, France
Boat: Hunter Marine 38
Posts: 337
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re: Septic tank question
Clogged vent line?
Envoyé de mon iPad à l'aide de Cruisers Sailing Forum
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31-07-2016, 08:44
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#3
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Moderator

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,973
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Re: Septic tank question
I changed the title from Septic Thank, to Septic Tank.
Is there a valve that has to be opened to change from the Macerator to the pump out port? That would be my guess
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31-07-2016, 09:00
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#4
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Registered User
Join Date: Aug 2011
Posts: 99
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Re: Septic tank question
the vent line i took it out and it was not clog
and i try also to put water where we connect the pump out and it fill very fast is it a pipe that goes to the bottom of the tank inside
capt Michel
a64pilot thanks for the change
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31-07-2016, 09:52
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#5
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Moderator

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,973
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Re: Septic tank question
Quote:
Originally Posted by fabrik
and i try also to put water where we connect the pump out and it fill very fast is it a pipe that goes to the bottom of the tank inside
capt Michel
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Yes, it is a pipe that goes to the bottom of the tank, it could be clogged I guess but think it unlikely.
More likely I think you will find a valve that allows overboard discharge or pump out, but not both, but I am not familiar with your plumbing.
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31-07-2016, 09:57
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#6
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Registered User
Join Date: Aug 2011
Posts: 99
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Re: Septic tank question
The only other way is with the macerator to empty the tank
i guess if inside it a pipe it might be clooged there because if i try to put water in it it fill very fast
so i will try to unclogged it
Capt Michel
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31-07-2016, 10:02
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#7
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Marine Service Provider


Join Date: Feb 2011
Posts: 1,648
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Re: Septic tank question
On my hunter 380 i have a problem with the tank when i do a pump our nothing come out so the on;ly way to empty it its at sea with the macerator
If you can empty it via the macerator and also fill the tank with water via the deck pump fitting, it is unlikely that the vent is clogged, but I'd check the vent thru-hull anyway, 'cuz that's one of the two most common location for a vent blockage...the other is the other end of the vent line--that end of the hose and the vent fitting on the tank. A blockage in the vent HOSE except for the end at the tank is very rare.
So I second a64pilot's opinion that there's a valve that needs to be switched between pumpout and overboard that's staying open to overboard.
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31-07-2016, 10:03
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#8
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Marine service provider

Join Date: Sep 2014
Location: puget sound washington
Boat: 1968 Islander bahama 24 hull 182, 1963 columbia 29 defender. hull # 60
Posts: 4,690
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Re: Septic tank question
Between the tank and the macerator pump there should be a three way valve called a diverter valve.
This valve is a three way one it must be aligned correctly to either the macerator or the deck pump out check it first . I would bet it is not aligned for pumping the tank
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31-07-2016, 10:17
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#9
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Registered User
Join Date: Jan 2012
Location: St Pete
Boat: Sabre 34
Posts: 481
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Re: Septic tank question
What about a vacuum leak between the deck fitting and the tank?
Or, the pump out itself, does it aggressively suck up seawater when you put the hose end into the sea?
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31-07-2016, 10:29
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#10
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Registered User
Join Date: Aug 2011
Posts: 99
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Re: Septic tank question
no y valve its pump out or macerator but thanks everyone will try to unclugged the pipe that is inside and change the vent pipe
Capt Michel
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31-07-2016, 11:44
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#11
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cruiser
Join Date: Jan 2012
Location: Somewhere in the Adriatic Sea
Boat: Oyster 53 Cutter
Posts: 8,595
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Re: Septic tank question
We had the same problem on my friends Hunter 450. The pump out line was too close to the bottom of the tank, so when there was some hard sludge at the bottom, the line became blocked. You need to lift the line up an inch or so off the tank bottom, or better yet, cut the bottom of the hose at a slight angle to draw more from the side.
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31-07-2016, 12:10
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#12
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Moderator

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,973
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Re: Septic tank question
There is a hose inside the tank?
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31-07-2016, 12:15
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#13
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Registered User
Join Date: Aug 2011
Posts: 99
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Re: Septic tank question
Thanks will try that
Capt Michel
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31-07-2016, 12:23
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#14
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Sponsoring Vendor


Join Date: May 2011
Location: Miami Florida
Boat: Ellis Flybridge 28
Posts: 3,239
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Re: Septic tank question
Unless there are two discharge fittings and you can pump it out with the macerater, it must be a blockage in the discharge pipe between where it is teed off for the macerater and the deck fitting.
If the vent was blocked, the macerater wouldn't work.
If the blockage was below the tee, the macerater wouldn't work either.
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31-07-2016, 12:27
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#15
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cruiser
Join Date: Jan 2012
Location: Somewhere in the Adriatic Sea
Boat: Oyster 53 Cutter
Posts: 8,595
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Re: Septic tank question
Quote:
Originally Posted by HopCar
Unless there are two discharge fittings and you can pump it out with the macerater, it must be a blockage in the discharge pipe between where it is teed off for the macerater and the deck fitting.
If the vent was blocked, the macerater wouldn't work.
If the blockage was below the tee, the macerater wouldn't work either.
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Our Hunter wasn't plumbed like that, it had a hose entering from the top, extending down to almost the bottom of the tank as a pick up for the pumpout. The macerator was plumbed separate. No tee valve.
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