lol I KNOW you are unhappy with the way it has been done. I GET IT.

I am talking about a moral point of view - you SHOULD WANT to cover all your water usage REGARDLESS of whether or not he has put in a water saving shower head. (Which as I said above, you can buy yourself and DIY) Why would you only do as much as you are required when you could be doing what you SHOULD?

That's all. If you want to do the bare minimum because that is all someone said is required of you, that that is fine too. You just asked the question how do you come to an agreement about the reasonable amount, and IMO, I gave an answer that you should just cover all of it.

The conversation moved on from your initial post of "I'm cut about the way it was done, how rude" to "Right, going forward, how do we deal". The latter is what I answered.