Essentially I'd like an option to have it just be a water tank that doesn't refill itself.

Currently I'm using the wooden water tank from AgriCraft in my kitchen which is being fed water from Railcraft water tanks which collect my water. I'm playing with finite water (no vanilla infinite water sources or HarvestCraft water sources either of course).

I'd love to be able to replace the AgriCraft tank with the sink block in my letsplay! It'd look so much better!