Can the hose connecting the toilet and the tap water leak and be replaced?

Generally, there is no problem, but the local water quality is really bad, you can add a filter device before the toilet enters the water, as if Jiumu's toilet has its own filter device. It is enough to clean the filter often in the future. >>>More

What is affected by it, you think too much, the water in the toilet tank is fed through pressure.

I can change it. If it is a hose, turn off the angle valve before changing, pump down the water in the water tank, loosen the old pipe = end nut with a wrench, fold it off, and then install the new pipe in the same way.

All the water in the house comes from one place. The water pipes behind the water meter reach all corners through tees, including toilets, including faucets, including water heaters.

Tap water is not direct drinking water, so try not to eat it raw.