Replacement for fresh water tank shutoff valve?

[Stu Jackson]

One advantage of having two shut off valves is that you can fill both tanks from the aft tank if both valves are open and you can also leave the aft tank full  and then fill the stbd tank when it runs out.

I fill both tanks from aft.  The deck fill cap is bigger.  Go figger...  I use the aft tank, starboard as reserve.

From a purely engineering perspective, having "dedicated" shut off valves for each tank for BOTH isolation (either/or) AND separation (both off), is a usual design criteria for even house plumbing systems.  The one thing about house plumbing systems that I detest (!!!) is no separate shutoff for showers and bathtubs.  Criminal, I say!

Your boat, your choice.   

[kh3412]

Made some manifolds to get rid of all the plastic fittings for the water supply.

[Noah]

Kh- what is the location of the tank in your photos? I am a bit confused at what I am viewing.

[kh3412]

Noah
That's looking through the bottom false drawer. The tank is the hot water tank. I used a point of use tank
4 gallon as we are rarely on a hook. This way I don't have to deal with the loop from the engine. It's something
The Admiral and I discussed. She is fine with boiling water if she needs to.

[csimmerling]

thanks everyone for your help! I ended up replacing both gate valves (and the extra hoses and clamps) with a simple 3-way PVC ball valve rated for pressurized systems. It was $20 online and is a much cleaner install that the previous setup, and much easier to use as well.