Peggy, Am in the planning stages of the dreaded replacement of the 12 year old alum holding tank in my Hunter 37.5. Needless to say, tank and all hoses will be replaced. One small concept or modification still lurks...ventilation???? Read someplace a while ago that it is supposed to be beneficial to have two vents on a holding tank? If that is so, then at tank change, this would be a very good time to accomplsh that little chore??? Am I right in assuming that the vent lines should be attached on opposite sides of the tank? Not having seriously crawled back into the dungeon of the tank location yet, I am assuming for the moment that the two vent lines can exit the hull in close proximity to each other, which is thru the hull just under the deck pumpout fitting?? Would appreciate your thoughts. Thanks, Steve s/v Sun Runner
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Two vents not always needed
A single larger diameter vent will get the job done most of the time. Whether two are needed depends on the length of the vent line and other factors. As long as you're about to replace the tank, this would be a good time to consider upgrading the whole system, including adding a Lectra/San--CG Certified Type I MSD that treats waste and discharges it overboard legally in all waters except those specifically designated "no discharge," which, except for two very small areas (Herring Bay and the Northern Bays), the Chesapeake Bay is not. And treatment is a MUCH sounder ecological way of managing waste than holding tanks. You'd still be well advised to have a small holding tank too...just in case your cruises take you into a "no discharge" harbor or marina. Check it out on the Raritan website at http://www.raritaneng.com I think you'll also find the information at the link below useful too.
A single larger diameter vent will get the job done most of the time. Whether two are needed depends on the length of the vent line and other factors. As long as you're about to replace the tank, this would be a good time to consider upgrading the whole system, including adding a Lectra/San--CG Certified Type I MSD that treats waste and discharges it overboard legally in all waters except those specifically designated "no discharge," which, except for two very small areas (Herring Bay and the Northern Bays), the Chesapeake Bay is not. And treatment is a MUCH sounder ecological way of managing waste than holding tanks. You'd still be well advised to have a small holding tank too...just in case your cruises take you into a "no discharge" harbor or marina. Check it out on the Raritan website at http://www.raritaneng.com I think you'll also find the information at the link below useful too.
Thanks
Peggy, Thanks for your response. Will check out the many options. BTW, did order your book and look forward to reading it. Thanks again.
Peggy, Thanks for your response. Will check out the many options. BTW, did order your book and look forward to reading it. Thanks again.
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