I think this mod is great; it does exactly what it's supposed to in professional manner.
The only thing I don't like about this mod is the recipe.
Currently, you need
4 iron sticks (This is okay, I don't see why a well needs iron poles but they deserve more use cases anyway)
8 stone bricks (This is good, a well should be made out of bricks)
40 stone (This is alright, it makes scene why a well would take stones but it's not incredibly necessary because of the brick)
1 Offshore pump (This is great, it signifies that the stone water well is an upgrade, and I understand that the well works with hidden offshore pump)
1 Underground pipe (This is bad, underground pipes are always used in twos, and requiring just one makes a lot of peoples' OCD kick into action.
Also, having 5 ingredients for an early-game item makes putting the well in a mall impossible until much later.
I recommend getting rid of the underground pipe so that this item can be put in a mall and so that it doesn't leave you with an odd amount of underground pipes.