Weekly flushing
 3. (1) This section applies to a school, private school or child care centre to which section 4 does not apply. O. Reg. 459/16, s. 4 (1). (2) The operator of a school, private school or child care centre to which this section applies shall ensure that, (a) the plumbing is flushed on the first day that the school, private school or child care centre is open in each week; and (b) the flushing is completed before the school, private school or child care centre opens for the day. O. Reg. 459/16, s. 4 (1). (2.1) The flushing requirement in subsection (2) does not apply to the following: 1. The plumbing in a part of a building that is not open for the entire week. 2. The plumbing in a part of a building that is used for student accommodation and that is not used communally. 3. A drinking water fountain or tap that is primarily intended for use by the general public. O. Reg. 459/16, s. 4 (1). (2.2) If a building houses a school or private school that is open to children under 18 years of age for 24 hours on the day referred to in clause (2) (a), the flushing shall be completed at the earliest practicable time.  O. Reg. 400/07, s. 2 (2); O. Reg. 417/09, s. 2 (3). (3) For the purpose of clause (2) (a), plumbing shall be flushed in accordance with the following rules: 1. The cold water must be turned on for at least five minutes at the last tap on each branch or each run of pipe in the plumbing that serves a drinking water fountain or a tap described in paragraph 5 of subsection 5 (2). This rule applies to each building with plumbing that serves such a drinking water fountain or tap. 2. If a filter or other device that treats water is installed on or near the tap referred to in paragraph 1 and it is practicable to bypass the filter or other device without removing it, the filter or other device must be bypassed during the period that the cold water is turned on under paragraph 1. 3. After complying with paragraph 1, the cold water must be turned on for at least 10 seconds at every drinking water fountain and every tap described in paragraph 5 of subsection 5 (2), unless one of the following circumstances exists: i. Test results from the first litre of the most recent set of water samples taken from the fountain or tap show lead levels at or below one microgram per litre. ii. A filter or other device that treats water and is certified for lead reduction is installed on or near the fountain or tap, treated water from the fountain or tap has been sampled and tested for lead at least once after the installation since June 7, 2007, and the test results show lead levels from the first litre of water at or below one microgram per litre. 4. If a tap or drinking water fountain that is turned on under paragraph 1 or 3 has an aerator, the aerator must not be removed.  O. Reg. 243/07, s. 3 (3); O. Reg. 400/07, s. 2 (3, 4); O. Reg. 459/16, s. 4 (2, 3). (4) The operator of a school, private school or child care centre shall ensure that a record is made of the date, time and location of every flushing required by subsection (2) and the name of the person who performed the flushing. O. Reg. 459/16, s. 4 (4). (5) Subsection (4) does not apply in respect of a part of plumbing that is flushed by an automatic device if, (a) the operator of the school, private school or child care centre ensures that the operability of the device is verified, (i) at a minimum, at the frequency set out in the instructions provided by the manufacturer of the device, or (ii) if no instructions mentioned in subclause (i) are available, at least once in each month; and (b) the operator of the school, private school or child care centre ensures that a record is made of the date of each verification mentioned in clause (a) and the name of the person who made the verification.  O. Reg. 417/09, s. 2 (4); O. Reg. 459/16, s. 4 (5).