I was just wondering how hot my water is allowed to be in my laundry? Comments Off on I was just wondering how hot my water is allowed to be in my laundry? 14 Jan 2016 Vote Up 0 Vote Down Answered Public Public Private Electric Water Cylinders Anonymous asked January 14, 2016 hi, i was just wondering how hot my water is allowed to be in my laundry? 1 answer Vote Up 0 Vote Down Public ⋅ January 17, 2016 In New Zealand the rated domestic temperature is 55 (regulated by a tempering valve) degrees to any wash hand basin, bath, shower or kitchen tap but your laundry may be un-tempered as per G12 NZBC up to 60 degrees. Â #1 Please login or Register to Submit Answer