The Prophet's reservoir (Ḥawḍ al-Kawthar) is affirmed. Reports describe the purity and fragrance of its water and the abundance of its vessels, as well as a warning concerning those kept away from it.
Intercession takes place by Allah's permission and will; it does not negate His justice or sovereignty. Its reported forms include the great intercession, entrance to Paradise, and the raising of ranks.
The reservoir and intercession concern realities of the Hereafter; they are understood within reliable transmitted teaching, not reduced to ordinary worldly assumptions.