Modular piping outside water?

[lastlight]

If it's a couple inches above the tank (where if it drips it will enter the tank) and right before it exits the plumbing I don't see why not. I have done this before without issue. After a year I had a tiny little bit of salt creep around the joints that's it.

Be careful workin on the tank tho. Depending on the angles if you bumped the locline and snapped a few links off it could be aimed out the tank.