Roger Long wrote:
I found the leak.

Shot my theory in the tail.

Very small and didn't cause the problem on it's
own.

Or did it...? Two problems, maybe?

The pump is dry as a bone around the diaphragm...

A failing/failed diaphragm wouldn't cause the pump to leak...it creates
an air leak in the pump that causes the pressure to drop, which turns on
the pump. As the tear in the diaphragm gets bigger, the pressure drops
more often and lower, causing the pump to cycle more frequently and
longer...till finally the pump can no longer prime.

even after pumping
enough to fill the holding tank 3/4 full with fresh water to flush it.

???...holding tank or water tank?

The sink drain "T" into the head intake line works great although it
means a lot of head pumping.

Most likely because the toilet is pulling air through the sink that's
preventing from priming. Put a plug in the sink when flushing with sea
water...when flushing with water from the the sink, the sink needs to be
at least half full. Just running water down the sink drain won't work
'cuz the toilet will pull more air than water.

--
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

Roger Long wrote:
I woke up last night to the sound of the fresh water. I'd left the
switch on and it started in the middle of the night. The pump was
running dry and the water tank was empty.

Hi All:

Help me out here. Why do I need a preasure water system for my
drinking/galley water.

For that matter why a water heater? Yea I know to have hot water. So
why need hot water?

Bob wrote:
Roger Long wrote:
I woke up last night to the sound of the fresh water. I'd left the
switch on and it started in the middle of the night. The pump was
running dry and the water tank was empty.

Hi All:

Help me out here. Why do I need a preasure water system for my
drinking/galley water.

For that matter why a water heater? Yea I know to have hot water. So
why need hot water?


You don't need either but you (or others) may want them.

Personally, I enjoy dropping the hook after a long sail and taking a
nice hot shower before hitting the sack.

YMMV

--AG

"Bob" wrote
Hi All:

Help me out here. Why do I need a pressure water system for my
drinking/galley water.

For that matter why a water heater? Yea I know to have hot water. So
why need hot water?


Because it came with the boat and now I've been softened, corrupted.
Gosh, it was so much fun to be hunched naked over a bucket of tipid
water in the cockpit on a cool Maine morning with a sponge. A proper
hot shower is sort of like GPS, it takes all the fun and charm out of
cruising but, once you've tried it, you can't give it up.

Besides, it's so much fun to see the faces of visitors when I say,
"Look, hot running water!"

--

Roger Long

In article .com,
"Bob" wrote:


Roger Long wrote:
I woke up last night to the sound of the fresh water. I'd left the
switch on and it started in the middle of the night. The pump was
running dry and the water tank was empty.

Hi All:

Help me out here. Why do I need a preasure water system for my
drinking/galley water.

For that matter why a water heater? Yea I know to have hot water. So
why need hot water?

it is obvious that "Bob" doesn't cruise with Ladies...... WomenFolk
demand water, and Hot water is what "Bob will be in, if he tries to
cruise around a lot, with women aboard, and no running water.......

You wrote:
it is obvious that "Bob" doesn't cruise with Ladies...... WomenFolk
demand water, and Hot water is what "Bob will be in, if he tries to
cruise around a lot, with women aboard, and no running water.......

I gave up on "ladies" a long time ago. I prefer women now.
You know the ones..... ex peace corps volunteers with harry arm pits
and a passion for adventure.

But I do agree, ot water is ablessing in anything up from N38.
Bob