Print: In this video a physiotherapist demonstrates gentle exercises for piriformis syndrome, a form of sciatica. The aim of these exercises is to stretch and mobilise the piriformis muscle in the buttocks and therefore to reduce the symptoms of sciatica. This video is part of a series on exercises for sciatica.
1 AGE: On average, your gas hot water heater should last anywhere between 8 to 12 years, while an electric model will last a bit longer at 10 to 15 years.  WATER: When you use your hot water tap, does the water look a bit tinted?
As most people would vary the settings, depending on the temperature, the gas bottle will last some duration between 147 and 367 hours. So, if you use your heater for four hours every evening, you would expect your gas bottle to last anywhere from 37 to 92 days. Hot Water Consumption Calculations: A 16L/min 130MJ 5.0 Star continuous flow hot water heater running at full capacity will last for 16.9 hours of actual run time. This equates to about 204 five minute showers. However, the water heater can run at a flow rate of as little as 3.5L/min. When running slower, the unit will self-modulate and consume less gas. This would increase the run time by roughly 4X or to about 68 hours.