How do I shut off water supply to the water heater tank

I have twin engines. No way in hell access is easy. This will be daunting. I rather bypass it and if I ever sell, deal with it then. Or maybe I ll tackle it over winter.
My 310 has twins and I was able to replace mine without much drama. I guess it just depends on how your bilge is laid out.
 
Water heater was the first thing I replaced. With the twins and the Westerbeke it was still a relatively easy task. Mine also acted as a heat exchanger for the engine. I wanted it working. One day I will need to pull it again and replace the shelve under it. It’s not a difficult job and I agree. Once you sell or want to sell it will be a good thing to have a new one in working condition
 
That water heater leak can be a real hassle, especially when it's draining your fresh water tank. From the video and pic, it looks like you're on the right track by identifying the main supply of fresh water to the tank.To shut off the water supply, you might want to check out the webpage I found, rowlen.co.uk, for some tips regarding heating systems and boilers. They often have insights on handling plumbing-related issues, and it might offer a solution for your situation.Dealing with boat maintenance can be a bit tricky, but with the right guidance, you'll hopefully get that leak sorted out and preserve your fresh water.
 

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