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#1
posted to rec.boats.cruising
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question on marine heads
a few years ago there was the 'princess of poop' (i think her name was
peggy) who knew ALOT about marine heads... anyhow, i have an electric head on the boat which has a 3 gallon tank. it's filled with water and deodorizer. when the head is flushed this gets recirc'd through the tank. no connection to raw water is made. however, there's a direct connection from the rear of the toilet to a pump out port on the boat but i'm not sure if the tank on the head can take the pressure of the pump out, so i want to install a holding tank. i'm looking at a 6 gallon polypro waste tank with 2 connections and a vent connection. it looks like these waste tanks are USCG certified (since there will be no sea connection). so do i NEED a tank? is the 3 gallon holding thank on the head going to take the pressure of a pumpout without blowing up? if i install a polypro tank with no sea discharge is that legal for USCG cert? (it seems it is). any hints to ensure no unpleasantness? |
#2
posted to rec.boats.cruising
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question on marine heads
All you really need is a Cedar Bucket. Legal anywhere, and has the coveted
Capt. Neal®© Seal Of Approval. "wf3h" wrote in message ... a few years ago there was the 'princess of poop' (i think her name was peggy) who knew ALOT about marine heads... anyhow, i have an electric head on the boat which has a 3 gallon tank. it's filled with water and deodorizer. when the head is flushed this gets recirc'd through the tank. no connection to raw water is made. however, there's a direct connection from the rear of the toilet to a pump out port on the boat but i'm not sure if the tank on the head can take the pressure of the pump out, so i want to install a holding tank. i'm looking at a 6 gallon polypro waste tank with 2 connections and a vent connection. it looks like these waste tanks are USCG certified (since there will be no sea connection). so do i NEED a tank? is the 3 gallon holding thank on the head going to take the pressure of a pumpout without blowing up? if i install a polypro tank with no sea discharge is that legal for USCG cert? (it seems it is). any hints to ensure no unpleasantness? |
#3
posted to rec.boats.cruising
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question on marine heads
"wf3h" wrote: a few years ago there was the 'princess of poop' (i think her name was peggy) who knew ALOT about marine heads... Peggy Hall. i'm looking at a 6 gallon polypro waste tank with 2 connections and a vent connection. IMHO, 6 gallon holding tanks are a waste of time and money. BTDT. 15-20 gal is a minimum size. Lew |
#4
posted to rec.boats.cruising
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question on marine heads
On Aug 31, 9:49*pm, "Lew Hodgett" wrote:
"wf3h" wrote: a few years ago there was the 'princess of poop' (i think her name was peggy) who knew ALOT about marine heads... Peggy Hall. i'm looking at a 6 gallon polypro waste tank with 2 connections and a vent connection. IMHO, 6 gallon holding tanks are a waste of time and money. BTDT. 15-20 gal is a minimum size. Lew interesting...why is that? it'll just be 2 of us on the boat for day trips. a 6 gallon tank is easier to install and holds about 50 lbs... |
#5
posted to rec.boats.cruising
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question on marine heads
On Tue, 1 Sep 2009 03:07:26 -0700 (PDT), wf3h
wrote: On Aug 31, 9:49*pm, "Lew Hodgett" wrote: "wf3h" wrote: a few years ago there was the 'princess of poop' (i think her name was peggy) who knew ALOT about marine heads... Peggy Hall. i'm looking at a 6 gallon polypro waste tank with 2 connections and a vent connection. IMHO, 6 gallon holding tanks are a waste of time and money. BTDT. 15-20 gal is a minimum size. Lew interesting...why is that? it'll just be 2 of us on the boat for day trips. a 6 gallon tank is easier to install and holds about 50 lbs... You'll find that you spend a lot more of your time dealing with pumpouts rather than sailing. A 6 gallon tank will be a constant nuisance. A six gallon tank holds about 50 pounds of WATER. What you will be putting it it collectively weighs substantially less than that. |
#6
posted to rec.boats.cruising
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question on marine heads
On Mon, 31 Aug 2009 21:49:03 -0400, "ElmerF."
wrote: All you really need is a Cedar Bucket. Legal anywhere, and has the coveted Capt. Neal®© Seal Of Approval Only if you wait until you're 3 miles offshore or back onshore to dump it. A bucket is considered a "device" and is illegal to dump overboard. It's perfectly legal to "hang over the side" and do your business, but if you came up with a toilet seat of sorts to bolt to the deck and sit on, that would not be legal because it's a "device". Rick |
#7
posted to rec.boats.cruising
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question on marine heads
wf3h wrote:
On Aug 31, 9:49 pm, "Lew Hodgett" wrote: "wf3h" wrote: a few years ago there was the 'princess of poop' (i think her name was peggy) who knew ALOT about marine heads... Peggy Hall. i'm looking at a 6 gallon polypro waste tank with 2 connections and a vent connection. IMHO, 6 gallon holding tanks are a waste of time and money. BTDT. 15-20 gal is a minimum size. Lew interesting...why is that? it'll just be 2 of us on the boat for day trips. a 6 gallon tank is easier to install and holds about 50 lbs... We have a 10 gallon tank on out 26. It gives us a comfortable 3 days for two people. I'd not recommend anything smaller than that. |
#8
posted to rec.boats.cruising
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question on marine heads
wf,
What's the problem with your current system? You say there are 2 of you and you are day-sailing. Your "porta-potty" sounds adequate for that. Dave M. |
#9
posted to rec.boats.cruising
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question on marine heads
Gogarty wrote:
By the way, does the bucket have to be cedar? Actually, the old oaken bucket is probably better. Doesn't absorb odors as bad and less slivers. G |
#10
posted to rec.boats.cruising
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question on marine heads
On Aug 31, 9:11*pm, wf3h wrote:
a few years ago there was the 'princess of poop' (i think her name was peggy) who knew ALOT about marine heads... anyhow, i have an electric head on the boat which has a 3 gallon tank. *it's filled with water and deodorizer. *when the head is flushed this gets recirc'd through the tank. no connection to raw water is made. however, there's a direct connection from the rear of the toilet to a pump out port on the boat but i'm not sure if the tank on the head can take the pressure of the pump out, so i want to install a *holding tank. i'm looking at a 6 gallon polypro waste tank with 2 connections and a vent connection. it looks like these waste tanks are USCG certified (since there will be no sea connection). so do i NEED a tank? is the 3 gallon holding thank on the head going to take the pressure of a pumpout without blowing up? if i install a polypro tank with no sea discharge is that legal for USCG cert? (it seems it is). any hints to ensure no unpleasantness? I'm having a hard time picturing your system. Your description makes it sound like you have a closed loop, with the 3 gallon tank acting as both the flush water and the waste repository. But that can't be right, so I'll assume you have a more traditional arrangement: Raw water intake -- toilet - 3G vented holding tank - pumpout port. The volume of the tank is unrelated to the amount of pressure (or amount of vacuum, to be more correct) the tank can take, although, a smaller tank can have thinner sides than a larger tank rated for the same vacuum. To answer your question, in order to pump-out, you must make sure your tank is vented. As the effluent is evacuated, an equal volume of air must be allowed to enter the tank. If the tank is adequately vented, the amount of vacuum generated by the pump-out station will be irrelevant, as no vacuum will build up in the tank. If it is not adequately vented, or if the vent is clogged, damage to either the tank (even a stout one), the toilet, or the pump will occur. The real limitation is the amount of rise from the tank to the pump-out port, and the rating of the hose connecting the tank to the port (i.e. you don't want the hose collapsing because of the weight of the effluent being sucked up). And of course, your vent must be big enough to let in air at the necessary rate. Laws notwithstanding, having a means to evacuate the tank in the absence of a pump-out facility can really save the day -- just something to think about. Hints? Yes: make sure the tank is empty before disconnecting hoses. ;-) More seriously, buy a heat gun, and use it to heat the hose ends -- makes the job of getting hoses on and off much easier. Good luck! Adrian. |
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