[Public-list] RE: Head Holding tank
Chris Lawrence
chris.lawrence at sympatico.ca
Tue Sep 7 08:39:40 PDT 2004
In my A30 (#500 1972), the holding tank consisted of a metal(too heavy to be
aluminium) plate riveted onto the fibreglass undersole. Pictures of a
similar install can be seen at
http://www.alberg30.org/maintenance/disorganized/head/under-sole/ although
it appears that the latter has a glass top. In any event, the metal rivets
and much of the sealant had deteriorated and previous owners had repeatedly
glassed and caulked over the seams and top of the tank. Believe me, having
drilled out the rivets and peeled off the tank top over the weekend, to find
a completely deteriorated and corroded mess inside, I can only attest to the
comments below. I am planning on installing a polyethelyne tank myself.
Chris Lawrence
24 Scarborough Road
Toronto, Canada M4E 3M5
T: 416-698-5136 F: 416-698-8953 E: chris.lawrence at sympatico.ca
-----Original Message-----
From: public-list-bounces at alberg30.org
[mailto:public-list-bounces at alberg30.org] On Behalf Of George Dinwiddie
Sent: 07 September 2004 11:02
To: Alberg 30 Public List -- open to all
Subject: Re: [Public-list] RE: Head Holding tank
Roger,
I advise reading Peggie Hall's "Marine Sanitation Fact vs. Folklore"
(http://www.overboardboating.com/maintenance/tipsmsds.asp among other
places). An excerpt:
Although you'll see aluminum and stainless holding tanks, no metal
of any kind should ever used to hold sewage. Urine is the most
corrosive material it's possible to put next to any metal. If you
doubt me, gentlemen (ladies will have to take your word for it),
notice the dividers between urinal stalls in men's rooms. If that
facility has been open for more than a week, no matter how clean
and well-maintained it is, even though the dividers are stainless
steel coated with enamel you'll see rust stains from the bolts
that attach the dividers to the tile. While the walls of a metal
holding tank may last a decade or more, the welds will typically
begin to leak at a seam or a fitting in two to five years,
and the tank will have to come out for repair or replacement.
- George
On Tue, Sep 07, 2004 at 10:35:59AM -0400, Roger L. Kingsland wrote:
> Mike,
>
> Could you direct me to some of the info you cite. I checked with both
> my NA and a tank manufacturer I found on the web and they said
> aluminum was not a problem. If I need to go w/ SS so be it, but the
> material cost about four times as much as aluminum (so, what else
> should one expect whaen owning a boat).
>
> Thanks, Roger
>
>
> ----- Original Message -----
> From: "Mike Lehman" <sail_505 at hotmail.com>
> To: <public-list at alberg30.org>
> Sent: Tuesday, September 07, 2004 10:09 AM
> Subject: Re: [Public-list] RE: Head Holding tank
>
>
> > Roger,
> >
> > Don't use aluminum for waste holding tanks. There is loads of advice
> > on
> the
> > web and loads of good reasoning why to avoid aluminum.
> >
> >
> >
> > Mike Lehman
> > ><((((º>¸.·´¯`·...¸><((((º>
> >
> >
> >
> >
> >
> > ----Original Message Follows----
> > From: "Roger L. Kingsland" <rkingsland101 at ksba.com>
> > Reply-To: Alberg 30 Public List -- open to all
> > <public-list at alberg30.org>
> > To: "Alberg 30 Public List -- open to all" <public-list at alberg30.org>
> > Subject: Re: [Public-list] RE: Head Holding tank
> > Date: Tue, 7 Sep 2004 09:54:45 -0400
> >
> > Mike,
> >
> > I agree with you RE taking measurements. If intended to go under
> > the aft end of the of a V berth, that tank would not come close to
> > fitting in #148 (1966, no liner). I am doing custom aluminum tanks
> > and the best I can do
> is
> > 18" deep and 18" port/starboard (about 27" fore/aft) for a tank that
> > is triangular in cross section. Plus, the shape in plan is a
> > parallelogram, not a rectangle. With a custom tank fitted to the
> > available volume
> (except
> > curving the tank bottom to conform with the curve of the hull) I
> > will get about 18 gallons. I can't imagine getting more than about
> > 10 to 12 with a stock tank. The stock one I removed held 6 gallons.
> >
> > Roger
> >
> >
> > ----- Original Message -----
> > From: "Mike Lehman" <sail_505 at hotmail.com>
> > To: <public-list at alberg30.org>
> > Sent: Tuesday, September 07, 2004 8:55 AM
> > Subject: RE: [Public-list] RE: Head Holding tank
> >
> >
> > > Maybe they cahnged some things since I did mine - now it looks
> > like the 5057 > is the right one. I am doing this from memory , but
> > it seems to the the > height was 16" not 19" as shown in the 5022.
> > I will take some more > measurements and let you know. I also,
> > strongly advize that befor
> buying
> > any
> > > tank , that you make careful measurents of your boat since we
> > have
> found
> > > some differences from one boat to another.
> > >
> > >
> > >
> > > Mike Lehman
> > > ><((((º>¸.·´¯`·...¸><((((º>
> > >
> > >
> > >
> > >
> > >
> > > ----Original Message Follows----
> > > From: "Chris Lawrence" <chris.lawrence at sympatico.ca>
> > > Reply-To: Alberg 30 Public List -- open to all
> <public-list at alberg30.org>
> > > To: "'Alberg 30 Public List -- open to all'"
> > <public-list at alberg30.org> > Subject: RE: [Public-list] RE: Head
> > Holding tank > Date: Sun, 5 Sep 2004 23:41:23 -0400 >
> > >
> > > Mike
> > > I looked at the Kracor website and Mold 5022 shown in your drawing is
> > listed
> > > as having 17 gallons, not 15. So either Kracor has increased the
> capacity
> > of
> > > the mold by using thiner materials (the outside dimensions are
> > the same as > in your drawing), or you have 2 more gallons of
> > capacity with which to > surmount unforseen circumstances...see
> > link below >
> > >
> > > http://www.kracor.com/support/holdingtanks.pdf
> > >
> > >
> > > Chris Lawrence
> > >
> > > Cirrus #500
> > >
> > > 24 Scarborough Road
> > > Toronto, Canada M4E 3M5
> > > T: 416-698-5136 F: 416-698-8953 E: chris.lawrence at sympatico.ca
> > >
> > >
> > > -----Original Message-----
> > > From: public-list-bounces at alberg30.org
> > > [mailto:public-list-bounces at alberg30.org] On Behalf Of Chris Lawrence
> > > Sent: 25 August 2004 18:43
> > > To: 'Alberg 30 Public List -- open to all'
> > > Subject: [Public-list] RE: Head Holding tank
> > >
> > >
> > > Thanks Mike - this helps a lot - your install looks A1!
> > > The tank I have is in the undersole, and I believe it was factory
> > installed.
> > > The previous owner had glassed over the entire surface and
subsequently
> > > caulked all around it; however it leaks and is now beyond repair. I
> think
> > an
> > > install in the forward berth makes more sense, because it is
> > always better > to be able to see the bilges and I am thinking I
> > will try and copy what you
> > > have done.
> > >
> > > Thanks again and best regards
> > >
> > > Cirrus #500
> > >
> > > Chris Lawrence
> > > 24 Scarborough Road
> > > Toronto, Canada M4E 3M5
> > > T: 416-698-5136 F: 416-698-8953 E: chris.lawrence at sympatico.ca
> > >
> > >
> > > -----Original Message-----
> > > From: public-list-bounces at alberg30.org
> > > [mailto:public-list-bounces at alberg30.org] On Behalf Of Mike Lehman
> > > Sent: 25 August 2004 11:38
> > > To: public-list at alberg30.org
> > > Subject: RE: [Public-list] where is #277?
> > >
> > >
> > > My boat is hull #505 and I installed a Kracor 14 gallon tank under
the
> > > v-berth on the portside, just in front of the bulkhead. Did your boat
> > have
> > a
> > >
> > > factory installed tank, or is the present tank from a previous owner?
> My
> > > boat did not have a tank. To see some pictures of the
> > installation go
> to:
> > >
> > > http://alberg30.org/maintenance/disorganized/head/
> > >
> > > Hope this helps.
> > >
> > >
> > >
> > > Mike Lehman
> > > ><((((º>¸.·´¯`·...¸><((((º>
> > >
> > >
> > >
> > >
> > >
> > > ----Original Message Follows----
> > > From: "Chris Lawrence" <chris.lawrence at sympatico.ca>
> > > Reply-To: Alberg 30 Public List -- open to all
> <public-list at alberg30.org>
> > > To: "'Alberg 30 Public List -- open to all'"
> > <public-list at alberg30.org> > Subject: RE: [Public-list] where is
> > #277? > Date: Wed, 25 Aug 2004 11:04:33 -0400 >
> > > Has anyone replaced a waste holding tank recently and if so any tips
> and
> > > what did you replace with? Thanks
> > >
> > > Cirrus #500
> > >
> > > Chris Lawrence
> > > 24 Scarborough Road
> > > Toronto, Canada M4E 3M5
> > > T: 416-698-5136 F: 416-698-8953 E: chris.lawrence at sympatico.ca >
> > > _______________________________________________
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