Great to hear, Mark! We are working on more projects that will be coming up soon! Our new website just launched as well. Check it out. www.boatnotes.com

Thanks! I am not sure what to tell you on water tanks. West System provides a guide on building tanks but never really says it's OK to build water tanks. Personally, I wouldn't do it for water tanks. Thanks for watching! Visit our new website if you get a chance. www.boatnotes.com

THanks. I check it out. Appreciate the info

Sure, just a saw hole in the bottom of the boat to accommodate your 200 gallon idea!

The tanks is holding up well. No smell, no leaks, no problems. The boat was caught in 8-12 foot seas with serious headwinds (30-40 knots) for over 24 hours on one sailing trip. It was a good test. I am very satisfied with the build quality of the tank.

Yeah, no, coating plywood doesn’t take a lot of epoxy. Once you learn how to use epoxy you’ll know this. 😂

Hello, thanks for your input. You make some good points. I feel the box is strong enough as constructed for our purposes, however. We have used it for one year, with 20 or so fills and pumpouts, sailed in rough weather a few times as well. So far no problems, no leaks, and no signs of distress. Yes, the epoxy threads are more than adequate, beyond strong. Flanges would have worked as well and might of been easier too. As far as the baffles, that is something I did not consider at the time. A good suggestion. My polyethylene tank didn't have baffles, nor did the larger versions that I was considering using as a replacement. In any regard, so far so good with our tank. I will do a follow-up video and show some of your suggestions for a more heavy duty version of the tank. For me, I feel it's a far superior tank when compared to the polyethylene tanks that were installed by the factory. Thanks for watching and thanks for the suggestions.

That's a good idea. Now for some numbers. Take a 2' by 3' panel on a tank like this. Say the head to that panel is 5 feet. So that is 5x0.444 psi/ft = 2.22 psi. 36"x24"x2.22 = 1920 lbs of force. Assume evenly distributed around perimeter = 120" therefore 16 lbs per inch of corner join. This is not accounting for the bending loads--which will be much higher. Remember that the pressure spreads the panels--opens the angle--puts the inside corner in tension. This is why you need the tape on the inside. Epoxy fillets are brittle in this type of loading. They are good in shear, nothing else. If there is a stiffness mismatch, they pop. Etc., etc. As for the epoxy threads, sure they are strong. But durable? 1 year okay. The whole integrity depends on the bond along that 1/2" end-grain faying surface...and the epoxy is toughened with what--cotton flock, or colloidal silica? Or wood flour? Details matter here. Epoxy is brittle. Did you consider putting all the penetrations through the top? That reduces the chances of leaks, too. Sewerage leaks are really really annoying obviously.

yea he did bro didnt u watch the video.. he coated it all with epoxy