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#11
posted to rec.boats.cruising
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How vacuum tight are 'Y" valves?
JimH wrote:
You are lucky Peggie because mine only farts and never burps. ;-) Apparently mine has somewhat better manners than yours. -- Peggie ---------- Peggie Hall Specializing in marine sanitation since 1987 Author "Get Rid of Boat Odors - A Guide To Marine Sanitation Systems and Other Sources of Aggravation and Odor" http://shop.sailboatowners.com/books...ku=90&cat=1304 |
#12
posted to rec.boats.cruising
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How vacuum tight are 'Y" valves?
The devil is in the details. Thinking about it for another few minutes
last night, I realized that I don't want to subject all these plastic hoses, joint, and screwed fittings that I'm trying to keep absolutely odor tight to pressure. If it was a steel tank with hard piping, maybe. Even then, I would want a pressure relieve valve and those are very low pressures to have one work reliably. A wad of toilet paper going up into the (too small) vent on our plastic tank could also turn this into a bomb that you don't even want to think about. Slightly off the subject: I remember a shipyard here in Maine needing to fill the built in tank in a just completed fishing dragger with water to test it. The water at the dock was off so they ran a long hose down the hill from the shop and connected it to the tank. They were smart enough not to hook it up to city water pressure and ran the water into a funnel. They weren't smart enough not to hard mount the hose to the tank and the vent hadn't been installed yet. The weight of water in the hose, with a vertical drop of about 25 feet, bowed the top of the tank up about 3 inches. Since this was also the floor of the crew's quarters, all the accommodations had to be ripped out and a huge section of the boat cut out and rewelded. It cost about $100,000 to fix. -- Roger Long |
#13
posted to rec.boats.cruising
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How vacuum tight are 'Y" valves?
Somebody should stuff Terry K down a storm sewer...
That's just plain ignorant. But with a "plastic ball valve" for a seacock, it's just a matter of time till his boat sinks, and then it will be fuel and oil that he'll be fouling the waterways with, not just sewage...sheesh! A marelon valve is ok as a seacock, but judging by his statements, I suspect Terry is more of a PVC from Home Depot kind of guy... And if you skip the vented loop with your system below the water line, You stand a good chance of sinking your boat as well, Roger. Do yourself a favor and check out this link to see how a system should be constructed, instead of over/under engineering it in your head. This tutorial will answer all your questions, and it has drawings of all common configurations.... http://www.westmarine.com/webapp/wcs...tionsystem.htm ....And if you see some dipstick dumping his boat OR RV in a sewer, call 911 and turn the idiot in.. |
#14
posted to rec.boats.cruising
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How vacuum tight are 'Y" valves?
markvictor wrote:
...And if you see some dipstick dumping his boat OR RV in a sewer, call 911 and turn the idiot in.. Actually, unless he's sticking a hose down a storm drain--and maybe not even then, other than aesthetics (which have never seemed to concern Larry)--there's nothing wrong with it. In fact, it's a lot more environmentally friendly than dumping a tank at sea. Everything on land including bird poop ends up in the sewer...and everything in a sewer--including the contents of all the holding tanks that are pumped out--ends up in a sewage treatment plant. I know quite a few people who have trailer boats who've installed connections to their sewer lines at home so they can dump their tanks. -- Peggie ---------- Peggie Hall Specializing in marine sanitation since 1987 Author "Get Rid of Boat Odors - A Guide To Marine Sanitation Systems and Other Sources of Aggravation and Odor" http://shop.sailboatowners.com/books...ku=90&cat=1304 |
#15
posted to rec.boats.cruising
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How vacuum tight are 'Y" valves?
It may not be such a bad idea (I'm not taking Terry seriously about the
storm sewer), IMHO. I came up with the same idea because of head system odors that I was convinced came through the thin diaphragm of the manual pump installed for pumping out the tank. I was going to use my dinghy pump. But I ended up relocating the manual pump to a cockpit locker and that was the end of the odors...in the cabin. I appreciate thinking outside the box. "markvictor" wrote in message ups.com... Somebody should stuff Terry K down a storm sewer... That's just plain ignorant. But with a "plastic ball valve" for a seacock, it's just a matter of time till his boat sinks, and then it will be fuel and oil that he'll be fouling the waterways with, not just sewage...sheesh! A marelon valve is ok as a seacock, but judging by his statements, I suspect Terry is more of a PVC from Home Depot kind of guy... And if you skip the vented loop with your system below the water line, You stand a good chance of sinking your boat as well, Roger. Do yourself a favor and check out this link to see how a system should be constructed, instead of over/under engineering it in your head. This tutorial will answer all your questions, and it has drawings of all common configurations.... http://www.westmarine.com/webapp/wcs...tionsystem.htm ...And if you see some dipstick dumping his boat OR RV in a sewer, call 911 and turn the idiot in.. |
#16
posted to rec.boats.cruising
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How vacuum tight are 'Y" valves?
"markvictor" wrote
And if you skip the vented loop with your system below the water line, You stand a good chance of sinking your boat as well, Roger. Yeah, that's what I would say to anyone else myself while wearing my boat designer's hat. In this case though, some part of the piping is going to be above the waterline anyway. A slow siphon into the tank, back through the joker valve, and out the bowl is possible but would be pretty slow. This isn't part of the system for operation by head users. It's just an emergency provision for if we get far enough downeast that we aren't near a pump out. In that case, we'll nip offshore and do the deed. I'll be doing all the pumping. The seacock gets opened just before the pump goes on and closed just after pumping is finished. The pump will have pulled air into the line so a siphon can't start even if the seacock should be opened by mistake. I'll take the handle off of this seacock after closing as double insurance. Sure, I could sink my boat but I would have to turn off the pump before the tank was empty and then just walk away so that the lines would be full enough for the reverse siphon to start. I might be that absent minded but, when I fly my plane, I look at switches that I could do thousands of dollars of damage and maybe even kill myself by flipping at the wrong time so I think I can handle it. In this case, a siphon break would not add significantly to safety and would be another potential odor leak and maintenance point. -- Roger Long |
#17
posted to rec.boats.cruising
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How vacuum tight are 'Y" valves?
Terry K wrote:
My waste tank is purged to the sea or, with an external hose connected, to the Wall Mart plaza storm sewer like RVers do it Peggie Hall wrote: Actually, unless he's sticking a hose down a storm drain--and maybe not even then, other than aesthetics (which have never seemed to concern Larry)--there's nothing wrong with it. In fact, it's a lot more environmentally friendly than dumping a tank at sea. Everything on land including bird poop ends up in the sewer...and everything in a sewer--including the contents of all the holding tanks that are pumped out--ends up in a sewage treatment plant. You may be a marine sanitation "specialist", but your knowledge of waste and run-off is blatantly lacking...There IS something wrong with it...(unless you feel there is nothing wrong with committing a misdemeanor), bird poop,and Larry"s Wal- Mart deposits, and, as you put it, "everything on land" does not end up in the sewer, I don't know what part of Idaho you're from, but in California, the vast majority of runoff goes to storm drains, barrancas,flood control channels,streams and rivers, and discharges directly to the harbors and ocean... nearshore or onshore, about 3 miles shy of the 3 mile limit..Our beaches are routinely closed by the Health dept. due to elevated levels of fecal coliform bacteria; bad enough from the"bird poop".. the last thing we need (or will tolerate) is morons dumping waste in the storm drains. How you could possibly think that dumping sewage to a storm drain is more environmentally friendly than at least taking it 3 miles away from where people live, work, swim, surf, etc. is beyond logic. Perhaps you've got stock in a gammaglobulin manufacturer...I'm sorry Peggy, you may be adept at odor control, but your knowledge of sanitation stinks.... So, I guess it's OK to pee in YOUR pool... |
#18
posted to rec.boats.cruising
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How vacuum tight are 'Y" valves?
She was saying it would be OK to dump it in a sewer, NOT a storm drain.
Go back and actually read the posts, Mark. |
#19
posted to rec.boats.cruising
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How vacuum tight are 'Y" valves?
The situation does vary geographically, even locally.
Here in Maine, we have a lot of combined sewer and storm drains. There are sills so that everything goes to the sewer plant until there is a heavy rain. Then, the flow overtops the sills and goes into the bay. We also have a lot of direct storm drains that are slowly being phased out. The "Friends of Casco Bay" had a program to go around and stencil little lobster emblems with the note "Drains directly to the bay" on them so people would know not to dump especially noxious stuff down them. One of the local sewer districts wanted to know how often the sills were overflowing and sending everything into the bay so they did something simple and clever. The went in and just set blocks of wood on top of the sills. If they looked after a rain, they would have the answer. Back when on was on the board of FOCB, they told me how much oil goes into the bay daily just from street runoff. I calculated the volume thinking that a visual display of a mock up black painted box would be great public education. This is a small city and most of the bay is rural and suburban. We never did the box thing because we couldn't figure out how to transport it. I've forgotten exactly how big it was but I think it was over 10 feet square. That works out to being a significant oil spill 365 days a year. It's just so distributed that the effects are invisible. Up here in Maine, it would not be a good idea to sump your holding tank anywhere not marked specifically for human waste. -- Roger Long "Keith" wrote in message oups.com... She was saying it would be OK to dump it in a sewer, NOT a storm drain. Go back and actually read the posts, Mark. |
#20
posted to rec.boats.cruising
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How vacuum tight are 'Y" valves?
Keith wrote:
She was saying it would be OK to dump it in a sewer, NOT a storm drain. Go back and actually read the posts, Mark. Peggie Hall wrote: Actually, unless he's sticking a hose down a storm drain--and maybe not even then, other than aesthetics (which have never seemed to concern Larry)--there's nothing wrong with it. In fact, it's a lot more environmentally friendly than dumping a tank at sea. What part of "maybe not even then" and "there's nothing wrong with it" do you fail to comprehend? If YOU would actually read the posts, you would see that what was said was that there may not be anything wrong with dumping in a storm drain, because "bird poop" and "everything else on land" ends up in the sewer and sewage is treated. That just isn't so... Animal waste is enough to cause beach closings, we don't need human waste and the diseases it can carry added to the runoff. It's not that hard to do the right thing... |
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