Hello all. I just made the switch from a 38 Top Gun, to a 2014 39GT.
Loving it, so far!
Unfortunately, the original manual did not come with it, and I have a few switches of which I don't know their function.
I was hoping a few of you gt, gts, gtr owners may know.
Keep in mind, I am in a fresh water setup and was told it is configured for pump out of black water, not pump into sea.
Please see my interpretations and correct me where I am wrong.

Fresh Water Pump: Turns on the pump to allow sink faucet and rear shower hose to work, plus toilet to flush.
Gray Water Pump: Pumps sink waste overboard. Anything else? I don't know where else I would gather gray water?
Salt Water Pump: Makes noise, but does seem to do anything. I am thinking this is the pump that would pump black water to sea, but that valve is closed?
Sucker Pump: Cant find and makes no noise when switched.

Another just above my flush button in the head is a silver push/momentary button. it does make noise, but unsure of function. Is it a macerator for solids? Are the flush and macerator separate functions? Only use macerator after you have flushed solids?

Also, I seem to only have a gauge for showing fresh water level, but nothing to show black water level. Anyone else have this? Seems odd I wouldn't want to know that level.

Thanks in advance!
Ryan

I'm not sure what the gray water and salt water pumps do, I've never messed with them or used the sink. I think the sucker pump fills the fish boxes with lake/sea water.

The black water tank level is in the toilet flush button. The light changes colors depending on the tank level. The tank is only like 5 gallons, so it doesn't take long to fill it up.

The silver button is the macerator, it pumps the black tank overboard. There is a valve between the tank and outlet port that has to be open so you don't accidentally pump overboard.

Thank you!

Bubba is spot on. One thing I did not know, or realize, the flush button changes color to indicate the level in the waste tank. Thanks.

just want to bump this again as I just brought a 39GT up to LOTO and have been searching for as much info as I can on the these tanks an how much they hold. Have place a couple of calls in the Cig w/o a response alos have no info from the factory. A build sheet would be nice !!!

Anyone know what the holding tanks are for water? I got the 5 gal on the waste (wow)

Sucker pump on my boat shot water out of the back of the port side when I tried. I assume W-party nailed it that this pump fills the fish boxes. The valve must be is closed on mine so it returns to the over-flow. My pump works, it actually did something.

I also noted you have to take a screw driver and remove the small chain attached to the waster water cap underide to do a pumpout. The waste water pump out is on the gunnal and u cannot screw in the pump out coupler b/c the chain is attached to the stainless waster water cap. Unless I am missing something which I migh, t this is completely impractical but it is what it is.

A little of subject but what is the difference between GTS and GT?

GT has tube frame center supports (top fish), the GTS is fiberglass structural supports located on the gunnals