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?
Hot Water Heater. Expected life: 10 years for gas or electric; 20 years for tankless. Total cost : $548 to $915 for energy-efficient model; $739 to $1,240 for tankless; $2,658 to $3,443 for heat-pump water heater.It's time if: The unit is ten years old or more, leaks around the base, or works erratically.ot Water Heater. Expected life: 10 years for gas or electric; 20 years for tankless. Total cost : $548 to $915 for energy-efficient model; $739 to $1,240 for tankless; $2,658 to $3,443 for heat-pump water heater.