as-Salaamu ‘alaykum wa rahmatullahi,
Mawlana Shaykh Hisham has said that if we mix the blessed water that we read the Khatm al-Khawajagan over with other water from our home, it will also become blessed. Does the same also apply to blessed Zamzam water or are we to always keep it separate?
Thank you for considering this question.
It is fine to mix Zamzam water with regular one. Insha Allah, it shall be blessed as well. However, it is preferred to drink Zamzam alone and keep it separate in honour of its greatness and blessing.