[C320-list] Another head question

[Gary Malcolmson]

Here's something to consider.  When I purchased our C310 new in 
Nov-2002, there was no direct head discharge out of the boat as it came 
from the factory  The dealer was going to install the plumbing 
(including a separate thru-hull) to allow direct discharge from the head 
if so desired.  Personally, for the way we use the boat I opted to not 
install that (thus as it came from the factory so that the head can only 
discharge into the holding tank--and the holding tank can be pumped out 
via deck fitting, or can be pumped overboard via macerator pump).  I 
don't know if the dealer was going to install a vented loop; but if the 
head were connected to an open thru-hull then, by all means, there 
should be a vented loop unless you like to gamble (personally I 
wouldn't-I don't have that kind of luck!).

I say all of this because it may be standard practice for Catalina 
Yachts to leave this up to each individual dealer and their negotiations 
with the first buyer.  Hence, you may find everyone's setup is not 
consistently the same.  I'd bet there are a lot of variations in this 
area of each individual boat.

Happy Sailing,
Gary Malcolmson
C310 #230 "Rhythm"

T. Scott Thompson wrote:
> According to Nigel Calder's book you should have an anti-siphon loop 
> on the output side of the head if you are connecting to an overboard 
> discharge.  He suggests one that vents vertically through a hose.  The 
> reason there is no such provision on most 320's is that most 320's do 
> not have a Y valve for direct overboard discharge, I suspect.  Were 
> these ever installed by the factory?  My boat has none.
>
> Scott Thompson
> Surprise, 653
>
> Darrell wrote:
>> I am curious why if there is an anti siphon loop on the head intake 
>> hose why there isn't one on the head output hose, couldn't the same 
>> thing occur if you had the Y valve switched to pump directly 
>> overboard and you left the thru hull open . I don't think I would 
>> trust the flapper valve in the head to prevent the toilet from flooding.
>>
>> Darrell, #88
>
>
>