Holding tank venting

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brucegorle	Holding tank venting		Lead	[-]
Posts: 29 09/21/07 16:02:55	Tags : None I hate to raise this subject yet again but a search thru the threads did not yield the info I wanted. I have researched the subject re the aft holding tank vent venting noxious odors and have decided that the "Head Mistress Peggy Peal is correct and we need a much larger vent and different vent location so that air can get into the tank to create an aerobic environment in the tank which eliminates odor. My question has anyone actually installed a larger vent 1" to 1.5" vent in the aft holding tank and were any difficulties encountered? Peggy advises not to install a filter as it actually creates the problem it is supposed to prevent Bruce Gorle Lifes Tough 903 2 cabin
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azure42		#1	[url]	[-]
Posts: 318 09/22/07 06:24:13	Bruce, 1.0 to 1.5"? Just be careful to never overfill your holding tank....cleaning the swim platform is no fun. Rod Williams Azure' #343, 2-cabin fin Alameda/San Francisco Bay, CA. Last Edited By: azure42 09/22/07 07:05:42. Edited 1 time.
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artbauer		#2	[url]	[-]
Posts: 5 09/22/07 08:17:03	Bruce, We also were bothered with noxious odors from the rear holding tank on our 2 cabin. I installed an activated charcoal vent line filter (Sealand p/n 309310002) in the vent line in the starboard cockpit locker. I also treat the tank with Odorlos after every pumpout. To eliminate the rotten egg smell from saltwater sitting in the head inlet hose, I replaced this hose with a reinforced rubber hose. My wife who has the nose of a bloodhound says that the head now smells sweet -- no odors at all! Note that it is important not to overfill the tank or effluent will get into the charcoal filter and damage it; also if you choose to replace the inlet hose make sure it is rated for below the waterline use. Art and Beth Adagio 910 2 cabin centerline
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brucegorle		#3	[url]	[-]
Posts: 29 09/22/07 17:18:39	The vent location was another of "The Head Mistress's'" recommendations. The location on the stern also defeats the purpose as normally the boat faces into wind(unless docked) which causes low pressure resulting in air being removed from the tank creating the anaerobic atmosphere resulting in odor. I want to vent the tank out the side in a similar location as the bilge pump thru-hull on the stbd side. Any comments?
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pwinterfeld		#4	[url]	[-]
Posts: 108 09/23/07 08:31:41	Hi Bruce I have not moved the vent - experienced similar odors - especially fun when at the dock and the admiral is serving lunch to guests. I was "ordered" to solve the problem. Removed the head, replaced with electric head, replaced all the hoses (white) including the "Y" valve. Replaced the vent hose. Opened the holding tank and powerwashed the interior (as best as I could), replaced the macerator pump with a better one (easy to do on a Catalina) then filled the tank with a mixture of water and vinegar. Now the boat smelled like a salad bowl. Let the mixture stand for a week. Flushed it out and reflushed it with fresh water. Now when we leave the boat for the week I fill the toilet bowls with fresh water and flush. After all this - NO MORE SMELLS,so far. Have fun. Peter C'est la Vie Hull #746
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CaptNorm42		#5	[url]	[-]
Posts: 617 09/23/07 19:01:55 Moderator	I was just at the Long Beach Boat show & saw a device that may help. The creator of The Begoneski sells an in-line device that has activated charcoal filtering. This device filters the hydrogen sulfate and methane gases that are forced out through the holding tank vent line when fluids displace space in the holding tank. The activated charcoal absorbs the gases, so what passes to the outside of the boat at the vent thru the cap fitting is greatly reduced and in most cases the odor is eliminated. The Begoneski costs $45.00 and replacement filter mesh is $10.00. Recommended filter change is every 4 months. If waste material passes up the vent line, due to an over filled holding tank, then the filter must be changed ASAP. Most end fittings are 5/8" but custom fittings can be requested. Sole Saver Products, is the manufacturer and sole distributor of this marine product. They have a basic web site, unfortunately no mention of this new product. The web site does have contact info. http://www.solesaverproducts.com/ ~~~~_/)~~~~ Norm Perron, Hull #600/2 cabin, Aphrodisiac, Marina del Rey, CA Last Edited By: CaptNorm42 09/25/07 14:02:19. Edited 1 time.
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george lyons		#6	[url]	[-]
Posts: 10 09/25/07 12:02:30	I am curious about the comment relating to; "To eliminate the rotten egg smell from saltwater sitting in the head inlet hose, I replaced this hose with a reinforced rubber hose" I note on my pumbing some lines are white while others are black . During commissioning I had some lines installed at both heads to allow direct discharge where permitted . The direcrt discharge lines are white , while the lines to the holding tanks are black . It never occurred to me that there might be a difference in oder reduction based on material composition ( I'm not real smart about these things ). The salt water smell is something that my wife also raises . Does changing the line composition result is a significant diference ? George lyons Lion Heart Hull 963
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artbauer		#7	[url]	[-]
Posts: 5 09/26/07 07:51:56	Hi George, I recently replaced the factory installed Head-Mate toilet with a Levac in the aft head. As part of that installation I replaced the clear PVC inlet hose with Trident 132 series heavy walled reinforced rubber hose. With the original PVC hose installed, the first couple of flushes after a week's time away from the boat produced a strong rotten egg smell. Once the new hose was installed that odor was gone. I'm not sure that the PVC itself was at fault, or the fact that it was clear allowing some light to penetrate (stuff was growing on the inside wall). I also do not know if sometwhere down the log, the rubber hose will begin to have the same problem. But, so far so good.... Thankfully, I'll be dumping the forward Head-Mate for another Levac in the spring. Art Adagio C-42 #910
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mikegraf		#8	[url]	[-]
Posts: 2 09/29/07 03:56:02	Hi Art, Which model Levac did you get to fit? Thanks in advance, Mike
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tinolanza		#9	[url]	[-]
Posts: 212 09/30/07 16:29:05	We used the Lavac Popular model when commissioning Dancing Dolphin back in 2000. The forward head is a manual while the aft head is an electric model. They have operated flawlessly for the past 7 years. Maintenance has really been minimal. During normal operation we use sea water, but we always flush the heads with fresh water when leaving for more than a couple of days. Tino Lanza, Dancing Dolphin (#739/3 cabin pullman, Westlake Village, CA)
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artbauer		#10	[url]	[-]
Posts: 5 10/01/07 17:18:13	I also installed the Lavac Popular (the only model now available, the Zenith having been discontinued). I put a manual unit in the aft head and plan to put an electric one in the forward head. The aft install went quite smoothly due to the conveniently located access door behind the toilet; I mounted the pump just forward of that door. I think the forward install might be a little more difficult as this boat has the forward head Y-valve option. The pump really wants to go where the Y-valve is located (under the seat on the port side of the forward cabin). Something will have to give.... If you are considering the electric version, the electric pump now being used (as of summer '07) does not have the "mount so the flow is vertically upward or up to 45 degrees off vertical" restriction that applies to the manual pump and earlier electric versions. The new electric pump has joker valves on both the inlet and outlet ends so it can be mounted in any orientation. This is handy as high quality sanitary hoses are pretty stiff and can dictate to some extent where the pump wants to be located. Regards, Art Adagio C-42 #910 2-cabin centerline
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