Catalina 315 Plumbing Schematic

[doaker]

I have a 2015 Catalina 315 and I’m trying to figure out where the kitchen sink and bathroom drain. I’m assuming it doesn’t go into a grey water tank but rather below the waterline.

Also my shower sump, which used to work seems to have conked out. What I turn it on, it doesn’t make noise so I’m guessing the motor is blown.
If someone has a map of the plumbing schematic, I’d greatly appreciate a share. Brian

 

[Calif. Ted]

Sink drains almost always go straight down to a thru hull and out on Catalinas and there is a circuit breaker on the electrical panel as well as the switch in the head for the shower sump pump.

 

[marchem]

Even with a schematic there's no guarantee that Catalina actually installed things that way. On the C310 I know of at least three different plumbing arrangements from the factory. You really have to just track the hoses yourself.

 

[Skipper John]

Here is the schematic. The galley sink should drain to a thru-hull that is located under the settee, next to the hot water heater (there also should be a separate thru-hull for the holding tank there, too). The head sink should drain to a thru-hull located in the cabinet under the sink (there also should be separate a thru-hull for the shower sump pump there, too).

At least on our 2022 315, there is a circuit breaker for the shower sump pump on the electrical panel. There is a switch to operate the sump pump on the forward edge of the sink cabinet, below the counter and above the hatch where the thru-hulls are.

Good luck!

 

[stephen_i_w]

Skipper John's diagram matches the one in my 2013 C315's manual. It matches my setup, except that I do not have a macerator. I also have a breaker switch for the shower sump.

 

[doaker]

Skipper John's diagram matches the one in my 2013 C315's manual. It matches my setup, except that I do not have a macerator. I also have a breaker switch for the shower sump.

Thank you all very much!