Galley Maid Toilet-Slow flush—Help?

The galley maid screw pumps will eat most anything.

Can you clarify some of your wording? We need to set a baseline.

"you 'hit' the button" & "I 'hold' the flush button" - are you doing the same thing the first time as you are the second? or are you just hitting the button briefly? Is HIT the same as HOLD?

When you "hit" the button, assuming you are just holding it briefly, the fresh water will come in before the bowl begins to empty. With the fresh water valve on, hold the button for 5 seconds, what happens? Hold it till the it fills to near the top then stop. (As you say it will go down after a couple hours)

"fills the bowl" - do you mean some fresh water goes into the bowl? or the bowl actually fills up?

I don't see a clog in this, when the fresh water valve is off and he holds the button, the bowl empties. So how fast does it empty? Does it slowly empty? (back to clog theory) does it empty with passion? (then back to the above)



I assume it is one of these?

And do you hear the pump running? They are very loud.

Well if Hit and Hold are the same, and the bowl is slow to empty then I have to say that NYCap is probably right, something is not grinding and likely clogged. But clogs should be brief if it made it to the macerator, cigars are nothing for it, but it will be foiled by tampon strings and condoms. Before I pull off the hose at the macerator, I would try to first use a plunger and move the blockage closer to the macerator, fill the bowl, push the button and plunge at the same time, the pump will suck and you will push, may dislodge the blockage and get it to the grinder, if so, all will work itself out, if not, you'll have to pull off the hose and fish up in there. Hopefully the pump is not far from the head.

I'd try the plunge before I decided to do a rebuild, $500 rebuild or a $5 plunger?

If you don't find an obvious clog or problem somewhere, my system is definitely slowed down by Uric Acid\Scale buildup inside the pipe to the holding tank. Since you don't know what maintenance the old owner did, this could be a cause as well. Using "sew clean" does wonders to keep my toilet emptying quickly. Something else to consider...

The rubber rotors are pretty easy, if not disgusting, to replace. I did one and found the hose to be completely choked down with hard calcium buildup. Should have replaced it, but didn't have access to a new hose, so I pounded it on the dock to break everything out. Worked like a champ after that. It's a pretty simple system actually.

Do NOT DO THIS. It will eat the daylights out of your rubber sanitation hoses, holding tank, and holding tank pump.