Peggie- Thanks for the reply and thanks for being so accessable. Here's
your questions and my answers:

" How high above the bowl is the vented loop (anti-siphon valve)?"

Approx 18"

"Does the bowl fill at the dock or an anchor when the boat is at rest, or
only when underway on the same tack as the intake thru-hull?"

Fills at the dock.




"Peggie Hall" wrote in message
om...
Noeta wrote:

Have a question about my head:

I have a Groco HF in my Catalina 34. It fills when the through hull
is left on.

I've rebuilt the head. Also installed new hoses and an anti-siphon
valve. The system is set up: Through hull intake to pump to Siphon
valve to bowl.

How high above the bowl is the vented loop (anti-siphon valve)?

Does the bowl fill at the dock or an anchor when the boat is at rest, or
only when underway on the same tack as the intake thru-hull?

Still, the bowl fills if the switch is left in the flush position. I
thought a an anti siphon valve would stop that.

What am I missing here?

I'll know when I have the answers to those questions.


--
Peggie
----------
Peggie Hall
Specializing in marine sanitation since 1987
Author "Get Rid of Boat Odors - A Guide To Marine Sanitation Systems and
Other Sources of Aggravation and Odor"

http://shop.sailboatowners.com/books...ku=90&cat=1304