[QUOTE="LVGS, post: 1711825, member: 141083"
I can confirm the following based on my visit to the boat earlier today (pls see attached pic):
1. Tank is no greater than half full;
2. Macerator pump is installed correctly; and
3. Macerator pump wiring is correct.
@LVGS
Just thinking out of the box here
1. How do you know that the tank is no greater than half full? - Are you are relying on a tank level indicator that may be unreliable?
2. Macerator is installed correctly - that looks right
3. Macerator pump wiring is correct? While your red may be hooked to the red and black to the black did you actually probe with a voltmeter to check that the red supply wire from the dc system is actually positive?
A couple other things to check
4. Is the white in line valve really open? - Yes the handle says its open but did the ball really move to open?
5. At your thru-hull, are you sure the ball is actually moved to the open position or are you relying only on the handle says its open - THIS HAPPENED TO ME - (not yelling, just for emphasis) the valve shaft didn't actually turn the ball so I thought it was open when in reality it was closed (I had to replace the thru-hull)
6. Is it even remotely possible that the macerator pump is internally wired backward? Stranger things have happened. Is this the first time that you have used the macerator since you installed it?
[/QUOTE]
Thank you for helping sort through the various contributors to the problem Smokey.
To answer your questions:
1. It is possible to see how full the tank is i.e. unless it is completely full or empty, using a flash light. Unfortunately, the tank level indicator is quite unreliable.
3. Every indication is that the wiring is OEM and therefore, I have assumed as I connected red to red and black to black, this is not the issue. However, I will check with a multimeter has you suggest.
4. The in-valve is definitely open, it was one of the first things I checked.
5. All the thru-hull valves were checked when the boat was lifted earlier this year.
6. It is certainly possible that the macerator itself is incorrectly wired internally. Other than testing it during installation, this is the first time we have used it to any extent. I have a spare (older generation) pump I might try.
Thanks again Smokey.