Ø ... what is a reasonable sized holding tank. < Depends on intended boat use. Short trips, rarely living onboard for more than a weekend, mostly tied to a dock lets you get away with a holding tank on the small end of the capacity range.
For Calypso which had plenty of room in the forepeak for a semi-custom poly tank we went with 40 gallons. The intended use plan included 4 to 6 onboard, anchoring out most of the time in sensitive waters for up to 4 days without access to a pump out or suitable offshore water. We added a 3 position (empty, ½ full and Stop Pumping) gauge (green, yellow, and red lights). All output of the head goes directly into the holding tank. From there we can pump out at a dock or use a macerator type pump overboard. We put in two vents, one each side of the boat to be sure the KO brand (now sold by Raritan) holding tank treatment had plenty of air. In over 10 years of often heavy use there has been little to no smell and only one "failure to contain" event when the red warning light was ignored by a post-race delivery crew. Search the internets for Peggy Hall's work on holding tank systems for a well written dissertation on all things poop related. Even if you are lucky enough to go minimalist regarding head and holding tank systems Peggy's experience will be helpful. Martin Calypso 1971 C&C 43 Seattle From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Joel Aronson Sent: Monday, October 21, 2013 1:27 PM To: cnc-list@cnc-list.com Subject: Re: Stus-List New Head and holding tank system. Danny, The 35/3 came with a 24 gallon tank. I pump out 1 or 2 times a season. The brochures on the website list tankage for various models. BTW, don't forget a vent! Joel On Mon, Oct 21, 2013 at 4:19 PM, djhaug...@juno.com<mailto:djhaug...@juno.com> <djhaug...@juno.com<mailto:djhaug...@juno.com>> wrote: Thanks for the responses. Just outside of buzzards Bay is beyond the no discharge zone. I've sailed out there quite a few times on nice breezy days. It would only be a 30-40 minute sail on a good day if I really needed to dump some poo... what is a reasonable sized holding tank. I really don't want to be carrying around too much of that stuff. I see new 40ish foot boats with 20 gal holding tanks... I don't know what that bladder I have now holds but, I doubt it is more than 15 gallons. In our harbor the Harbor master will put you on a schedule and you can notify that you need a pumpout by placing blue tape on your pumpout fitting. So I really would never need more than a week's worth of holding. Danny
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