immersion heater element failing within 1 year

[robgun]

Hi All, I have a standard 2 element hot water tank. I have replaced the elements on a regular basis ( approx they last 1 year [when 1 goes I replace both elements), we do have hard water, but then again i use the 'Incoloy' types ( which i am told should last a few years)

The top element is powered via a standard 13A fuse / flex which is plugged into an extention. I'm no electrician & I’m sure this isn’t 100% correct, BUT, when the elements work they work fine ( ie no power tripping / blown fuses ) BUT can anyone offer any explanation as to why my elements ‘go’ so quickly???
rgs rob

 

[poolebybirth]

they are not touching each other inside the hot water tank are they? this could cause them to burn out very quickly.

 

[robgun]

Nope, they can't touch inside the tank, besides the 'failing elements' the system in 4-5 years old & works fine.............. my only problem is the consistently failing elements