You should take “Jal Pachchakkhan” (also called Paaniya Pachkhan) before drinking water.

How to take it (simple and proper):

• Say the vow clearly before drinking.
• Specify these points: what kind of water, how many times, till what time, and any limits.

Sample wording (easy English/Hinglish):

• “I take Jal Pachchakkhan to drink only previously boiled and filtered water, during daylight hours, maximum 2 times, only as needed, without any living impurities.”
• “Huṁ boiled ane ghanṭiyuṁ pāṇī divasmaṁ (suryāsta sudhī) vadhāre māṁ vār na pīś, jarūr anusar be vār sudhī, jīv-himsā thi bāhar.”

If at night (only when truly necessary):

• “I take Rātri Jal Pachchakkhan to drink only previously boiled and filtered water between 7:00–9:00 pm, one time only, and nothing after that.”

Notes by tradition:

• Shvetāmbara: Often taken from Guru/pravartak; wording as above is acceptable when taken personally in absence of Guru.
• Digambara: Same principle (Pratyākhyāna). State boiled/filtered water, number of times, and time limit. Night drinking should be avoided; if unavoidable, take a very restricted time-bound pachkhan.

Essentials to remember:

• Use only previously boiled and properly filtered water.
• Prefer daylight; avoid after sunset unless there is unavoidable need and you have taken a strict time-bound pachkhan.
• Keep the count you declared (e.g., 1 or 2 times) and do not exceed it.
• Maintain care to avoid himsā (strain/filter well and check the vessel).

Sorry, I can only answer questions related to Jainism.