Grey Water System
Last year the water system was installed except for the drainage system. From the head sink, galley sink and shower all the grey water runs into a 12 Gallon tank, which gets pumped out as soon as it gets full. An probe type water level sensor will be attached to an Arduino Microcomputer to turn the pump on and off.
Here you can see the drain hose coming from the forward end of the ship and the new tank. I have to install fittings and such before it's ready but here it is set into place to make sure it fits. I have the air vent set in place to see what it looks like.	This is what the grey water tank looks like all done. The air vent is on the right, the access deck plate in the middle and the sensor probe on the left. The inlet will be installed on the tank once its in place because it feeds through the bulkhead.
Here is the sensor probe built out of PVC pipe. The wooden ring is the spacer I made because the threaded portion does not come up all the way to the flange. The longer pipe fits down into the tank and has the probes attached. The sealed pipe allows the wires to remain dry .	Here is the completed probe. I am using 3 stainless steel screws, one at the bottom for 12 VDC and the 2 here on the side to sense the water level. (I know they are crooked, they are offset so I can get a wrench in there to tighten down the screws.) I use the Arduino Microprocessor board to turn the pump on and off depending on the water level.
This is the outlet I put together with a thru hull fitting and a PVC pipe reducer. The screen will keep larger pieces of debris from entering the pump.	Outlet installed in the tank.. Yahoo !!
I decided to fasten the spacer in place with silicone.	Here's something I forgot about in the middle of the night. I need a shroud to protect the probes so they won't sense the water level when it is sloshing around while we are underway. Took me an hour to get the clamp tite wire on the left side, because the PVC pipe is so slippery. So on the next one I said, screw it and used a clamp.
Tank installed and ready to go. I had to design and build the mount for the pump, and the side pieces to hold the tank in place. The inlet from the galley and head is at the bottom.	Close up of the pump installation. Yahoo, another thing DONE!!!
Black Water
The black water comes from the toilet and goes into a large 18 gallon holding tank. A Macerator pump is used to macerate the poopy stuff and pump it out of the boat. The macerator pump was a challenge because I thought that the outlet was installed at the bottom of the tank and the air vent at the top.. Dahhh. All inlets and outlets are at the top of a black water tank, but the air vent goes down a pipe to about 1 inch from the bottom. Which makes sense because there is no way you want black water leaking all over the place. Good thing I got the instructions in the maserator pump manual before I cut any holes in the new big tank. So when the pump starts it creates a suction which sucks the water out until the suction is broken when the water goes below the level of the vent line.
So we got this $300 maserator pump and now I have to decide how to install it after I found out that my engineering design needs a little tweaking. So I built this platform to mount the pump just under the floor for maintenance. The inlet on the left goes right into the top of the tank via a 90 degree thru-hull fitting. It's all wired in and tested. Yeah ! (all in a days work). Note: The grey water from the pump will T into the outlet hose on the maserator pump.	Next I need to install a seacock and thru hull to get the black and grey water out of the ship. I picked this location because it is in easy reach once opening the hatch. The anti-siphon loop is going up under the deck to the left. Also it is about 24" under the water line so nobody should be able to see the waste water as it is expelled from the ship. Here it is ready for the backing plate.
I use a plastic tube to keep lined up with the hole as the West System expoxy dries. This backing plate is an old piece of 1" old growth fir. The bolts are expoxied to the wood, I don't want any bolts going through the hull.	The thru-Hull installed. Bedded with 3M 5200
A view down the hole in the ship. Yikes ! Had to make sure no goop got in the works..	All done, plumbed in and connected.
Dryer hose connected to the vent pipes.
Black Water Tank
I installed 2, 90 degree thru hull fittings to the tank. On this end it feeds right into the macerator pump.	On the left it will Y out to the toilet and the waste deck fitting. I also installed a deck plate in the center for clean out and for installing the thru-hulls, and the air vent tube.
Here is the completed Y junction. The "Out" Hose goes to the waste deck fitting and the "T Hose" hooks to the toilet.	Hooked to the pump.
Vent pipe installed. The 5/8" vent pipe hose goes to a charcoal filter to filter out the smell and then goes out the side of the ship. Now to test it to see if it works !	Here is the filter installed under the captains helm.