On Tue, 22 May 2012 02:48:14 +0000 (UTC), "Arklin K."
wrote:

c) It doesn't matter much if it's horizontal or vertical but Jandy (aka
Zodiac) prefers the vertical position for leakage prevention

chuckle I have a vertical and a horizontal J-valve. The vertical
valve is the ONLY one that has ever leaked. O-rings wear faster.

Disclaimer: It has a low voltage valve actuator - more use (solar
panel valve) so I expect the leaks....

On Tue, 22 May 2012 09:40:55 -0700, Oren wrote:

chuckle I have a vertical and a horizontal J-valve. The vertical
valve is the ONLY one that has ever leaked. O-rings wear faster

Actually, I mispoke. So your experience is what Jandy suggested would
happen. They prefer HORIZONTAL over vertical (it was my mistake in not
proofreading my summary!).

On Wed, 23 May 2012 01:26:34 +0000 (UTC), "Arklin K."
wrote:

On Tue, 22 May 2012 09:40:55 -0700, Oren wrote:

chuckle I have a vertical and a horizontal J-valve. The vertical
valve is the ONLY one that has ever leaked. O-rings wear faster

Actually, I mispoke. So your experience is what Jandy suggested would
happen. They prefer HORIZONTAL over vertical (it was my mistake in not
proofreading my summary!).

Good job on the replacement valve. Looked good.

Now?

Why did this valve crack? Was it freeze or it just gave up the ghost?

On Wed, 23 May 2012 12:12:33 -0700, Oren wrote:

Why did this valve crack? Was it freeze or it just gave up the ghost?

It was always leaking from the day I owned the pool.

I only removed it because someone suggested I fix all leaks while the
pool was empty for cleaning.

I suspect it cracked when the pump was running into it with the valve
closed; but I don't know how it cracked.