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?
Depending on hot-water usage, preventive maintenance and the amount of water impurities, the life expectancy of water heaters is 10 to 15 years. Thatâs approximately 3,650 to 5,475 days in a row the water-heating system is âonâ â heating, reheating and storing hot water. With this kind of work schedule, itâs plain to see why maintenance is so important. Trouble signs: Leaky water heater.