Here are some pics (click to enlarge) of the thing I keep replacing:
The part on the left hand side of this picture isn't usually replaced. I just unscrew the nut and put the 3 other bits (as a single unit) on the right hand side of the picture onto the existing thread/nut which is sticking through the wall of the tank. The arm with the ball on it goes into the slot that you can see in the picture below.
The unit above is about 3 months old.
The part on the left hand side of this picture isn't usually replaced. I just unscrew the nut and put the 3 other bits (as a single unit) on the right hand side of the picture onto the existing thread/nut which is sticking through the wall of the tank. The arm with the ball on it goes into the slot that you can see in the picture below.
The unit above is about 3 months old.