[Public-list] PHII head plumbing

[George Dinwiddie]

Most of our boats were built for direct overboard discharge, so no 
chemicals were necessary.  Any vented loop was generally in the 
discharge hose, between the head and the through-hull, so it wouldn't 
siphon back after pumping.  The intake was protected as long as you put 
the lever on the head pump back to the "dry bowl" position.

If you've got a holding tank, then you'll want something to help with 
odors.  The primary defense is an exchange of oxygen, accomplished with 
two large vent hoses.  I've also used ordinary "head treatment" 
chemicals, which are mostly deodorant.

Prior to swapping in the holding tank for the old Mansfield TDX system, 
then the treatment was formaldehyde.  This is a really noxious 
chemical--a cure worse than the disease.

This year I plan to try KO 
(http://www.raritaneng.com/products/cleaning_maintenance/kills_odors.html), 
a product marketed by Peggie Hall of Peal Products before her company 
was purchased by Raritan.

  - George

Peter Staehling wrote:
>> 3. from the other side of the vented loop to the
>> water intake at the back of the head.
> 
> Aurora's head seems to be working fine now that I
> hooked up the seacock directly to the front of the
> pump.
> 
> There is currently no vented loop between the back of
> the pump and the bowl.  Is one really
> necessary/recommended?  Someone (Mike?) said the bowl
> was above the waterline on this vintage of A30.  I
> guess that probably isn't true when heeled to port.
> 
> I was amazed that everything seemed to work since it
> looked like it was never winterized at least on the
> intake side.
> 
> One more question.  The manual for the PHII didn't
> mention chemicals.  What do you use if anything?  How
> do you add it to the tank?  Flush it?  Pour it down
> the pumpout?
> 
> Pete
> #554

-- 
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   When I remember bygone days                         George Dinwiddie
   I think how evening follows morn;            gdinwiddie at alberg30.org
   So many I loved were not yet dead,           http://www.Alberg30.org
   So many I love were not yet born.
                'The Middle' by Ogden Nash
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