What is the ruling on water used in a purification act that is not legislated?

Chapter on what purification is achieved with regarding water

Al-Mughni

Book of Purification

Book 2 · Issue 4 · Bab 2

Open in Qurani

Primary text

If the purification is not legislated, the use of water therein has no effect on its purity. It remains as if it were used for cooling down or washing clothes. The narration is unanimous that water used for cooling and cleaning remains in its original state of purity, and no difference of opinion is known regarding this matter.