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Current Replies for Mk V Holding Tank
  Mk V Holding Tank (JWente)
Posted: 4:44:18 pm on 11/19/2011 Modified: Never
I need a new holding tank.
Has anyone replaced the tank on a MKV?
Where can I find one?
  Re: Mk V Holding Tank (davidww1)
Posted: 3:34:43 pm on 11/21/2011 Modified: 3:35:08 pm on 11/21/2011
Since no one seems to have dived into this one (yech, bad image), a couple of thoughts. This page has a list of replacement tank makers. The information may be old and the author can't spell so there are inaccuracies in the links, but it's a start.

If you find that you really can't get there from here, you might copy a friend's trick - he made a cardboard copy of his tank, but slightly smaller to allow for the finished thickness of glass, slathered it with some sort of releasing agent, then gel-coated and fibreglassed it. After cutting an access hole, he removed the internal stiffening and any cardboard that came out easily. The rest, he assumed would rot and come out in pump-outs. An opening port and necessary fittings completed the job.

David Weatherston
Towser, Toronto
C&C 27 Mk IV

  Re: Mk V Holding Tank (Godspeed)
Posted: 12:16:44 pm on 2/16/2012 Modified: Never
We changed the holding tank on Godspeed several years back.  We could not find an exact replacement and finally bought one from Ronco Plastics.  We had to build a new location for it as it would not fit in the forward compartment under the V-berth.  We went to the next compartment under the V-berth and built a wooden frame that holds the tank.  It has worked out well for the six years since we did the replacement.

Mk V, #512

  Re: Mk V Holding Tank (carriden)
Posted: 1:11:48 pm on 2/16/2012 Modified: Never
Groco, Todd, Moeller, Ronco and Vetus all make replacement rigid tanks.  I have also had considerable success with a Vetus flexible holding tank, which I used for 2 decades in my C&C 25.  You have to properly secure it so that it won't shift around, but we never had any problems with odors or leakage.  The advantage is that the flexible tanks come in various sizes and can be fit into odd-shaped lockers or corners.  Western Marine is a Canadian distributor for Groco tanks and your local retailer can order from them.  Jamestown Distributors ( displays a large selection of tanks from several manufacturers.  
Be careful of changing the tank location as that will affect the balance of the boat, taking it away from the original design specs.

Marcus from Carriden

Mk III, Hull #847
Oakville, Ontario