[C320-list] Hoses for toilet

[Charles Munro]

Thanks Greg
A great description. Sounds like a project for next winter. June & July in Sydney !!
Charles 
Sabi Star

Sent from my iPad

> On 21 Sep 2024, at 1:17 PM, Greg Arnold via C320-list <c320-list at lists.catalina320.com> wrote:
> 
> Charles,
> 
> I have a boat of similar vintage to yours.  What you describe seems
> accurate.  I don't know about the situation on older boats.
> 
> I think the best plan is to remove the hoses and the vented loops from
> the cabinet/cupboard/medicine chest.  Then, remove the cabinet.  Working
> through the opening, glue two wood blocks to the hull, then screw the
> vented loops to them and reattach the hoses. This way, in the  future
> you can easily remove the cabinet.  Also, the hoses no longer are in the
> cabinet so you can store stuff there.
> 
> Once the cabinet is removed, you will find that the pumpout hose
> essentially blocks access to the vent hose and the vent.  At this point,
> you may feel like giving up.  However, there is an easy way to remove
> the hose and the vent despite the poor access.
> 
> First, remove the vent hose from the fitting at the holding tank. Then,
> go outside the boat and unscrew the visible part of the vent below the
> toerail (yes, you can unscrew it from the outside). Then, from the
> outside, push the remaining part of the vent inside the hull.  Go back
> inside the head, locate the vent hose, and give it a good pull.  The
> hose and the remaining vent fitting should come out.
> 
> The next problem is that the vent is so close to a liner that you
> probably don’t have room for the barbed end of a larger vent.  The
> solution to this and the access problem is to drill a new larger hole a
> few inches aft of the original vent.  Access to this new hole from the
> head is very easy.
> 
> What size of new vent to install?  On my boat, the vent hole in the
> holding tank is 3/4" female NPT.  The actual diameter of the opening is
> 1.050".  Catalina did not take advantage of this large hole, but instead
> used a 3/4" NPT x 5/8" barbed fitting with a 5/8" hose that runs to a
> 5/8" vent below the toerail.  This vent has a couple of minuscule
> openings for air to escape or enter.
> 
> It makes sense to upgrade to a 3/4" NPT x 1" barbed fitting at the
> tank.  Attach a 1" hose, and run it to new 1" mushroom vent in the new
> hole you drilled.  Your holding tank ventilation now has increased
> one-hundred fold.  Plug the original vent hole.
> 
> This describes my plan – I have not actually gotten around to
> implementing it yet!
> 
> Greg
> 2005 C320 #1054
> SoCal
> 
> 
>> On 9/20/2024 6:27 PM, Charles Munro via C320-list wrote:
>> I have been trying to work out how to access and inspect the holding tank vent hose connection to the through hull vent. It seems that I have to remove the vanity cupboard above the head. To. do this firstly seems to require the removal of the two toilet vented loops and to push the hoses back down to allow the cupboard to be removed? Is there an easier way ?
>> Charles Munro
>> Sabi Star #1011 2005
>> 
>> Sent from my iPad