Renal tubule—a long tube that ends in the capsule. It is
here where most of the filtration occurs

It would effect the salt balance in the body because there would be more water than salt in each blood cell. Every blood cell has an amount of water and salt. Now if you drink enough water then you would get water poisoning which is when your blood cells have so much water that they start to burst! Which is cool, except for the part where you would also die...