It’s three weeks ago today since we departed Mooloolaba/Noosa to head north quickly some 500 nautical miles to the Whitsundays, arriving a week ago. Our assessment was that the South East Queensland region, with Noosa its northern most community, was teetering on the edge of an extended COVID lockdown, whereas northern Queensland regions where far less likely to be extensively locked down.
So we cut and run with the bare bones of Great Sandy’s new gravity-draining black water holding tank, head enclosure, and basin in place, but with temporary electrical wiring, and no anti- siphon venting on the head. So over the past three weeks, we’ve had to scrupulously close both of the head’s seacocks immediately after use.
Great Sandy’s previous black water holding tank was below the water line, required Y cocks on its input and output, and regularly malfunctioned. Her new black water holding tank is located above waterline, and once into open waters can self-drain into the drink by opening a single seacock. The system is simplicity itself. A budget TMC electrical macerating marine head draws water into its bowl, and when flushed macerates the waste and pumps it into the top of the black water holding tank. The bottom on the tank is plumbed to the through-hull seacock below. When the seacock is open, gravity does the discharge work. If the seacock is closed, black water waste accumulates in the holding tank either for gravity discharge later in open waters, or for pump out at an approved facility.
The first pic shows the new basin cupboard, and the new black water holding tank is location behind the new head enclosure, with it’s the lid down, is to the right. Lid’s up in the second pic. The head used to sit in the open, and it's input and output hoses looked like confused spaghetti. The child bride wanted a cleaner look, hence the new head enclosure. The top of the head enclosure’s lid is at approximately water level. The bottom of the black water holding tank located behind the basin is just a few inches higher.
Yesterday, I completed permanent electrical connections, and installed a vented anti-siphon loop to the head’s bowl input loop. The holding tank is vented to the anchor locker, and acts as the anti-syphon vent on the head’s output loop. The final look will be all white, with a few varnished timber trims. This will not be tackled until we return to Noosa.
Maybe I missed something here. What size hose is this.
