Sailing Vessel The Bottom Line: Boat Projects - Holding Tank

[@johnhewett2525]

I'm just planning to relocate the heads on a Adams13. Love the idea of gravity drain to sea, great schematics and the whole project looks to be of a very high standard. I can see myself revisiting this video as a source of reference. Thankyou.

[@alanduffy7993]

Really nice work. That new vanity setup looks fresh and modern. I have similar void under the vanity which I think could be used for the holding tank. Thanks for sharing your setup, given me ideas,

[@bottomline4284]

All the best with your installation!

[@dyrectory_com]

You did a great job! 👏🏻

[@marksuthe9087]

We have to fit one to our yacht. We have had a ridiculous quote to get this done. However, does it matter where the tank is located on the boat?

[@bottomline4284]

Main considerations i had were: above or below water line, and distance from the toilet. I opted for above water line so a gravity drain to the sea was an easy option vs having to pump the tank out. I did install a deck fitting to allow shore-side pump out. Close to the toilet means less piping and probably less water required to move the waste which means it takes longer to fill the holding tank. On the same type of boat I know of people who’ve installed tanks under v-berths so I guess to an extent it comes down to space available and then adapting the design from there. Lots of info on the web more technical than my explanation. All the best with your install!

[@SailingwithHuonCry]

Love what you did with the waste tank. We have put one in under the v berth, but have a problem with emptying the toilet, either over board or into the waste tank. It drains ever so slowly and when flushing the toilet bowl fills up. Before we put in the holding tank, it worked perfectly. Any hinds how to fix it. Thanks

[@chrislukassen]

Thanks for the video. What type/brand of drain valve did you use?

[@bottomline4284]

Hi Chris. Under the holding tank is a PVC ball valve (Philmac) from the local hardware store irrigation section. About AUD $30. It attaches to the bottom of the tank via a through hull fitting. The other valve in the system is a Jabsco Y valve to send waste directly overboard or to the tank.

[@chuckduzzie8529]

Is there a materials list for this video???

[@bottomline4284]

Hi Chuck. No materials list but happy to answer a few questions. Cheers

[@svserafina7356]

That’s a neat job! How did you find working with the corian? And what do you think it cost you for the whole job? Thanks!

[@bottomline4284]

Hi Darren. Corian was easy enough to work with using normal drill bits and router. Seems to have bonded well to the bench and bowl using Sika. Total cost (including new electric toilet, all deck fittings, thru hulls, hoses, valves, taps, new hose clamps etc, pumps and holding tank) ~$1800

[@svserafina7356]

Thank you! That’s good to know