You can never tell with these things, can you? I suspect that you've done quite well with your pump, and it doesn't owe you anything. However, I'd prefer not to be in the situation again where my son and his girlfriend had no running water for over a week because he was unable to source a replacement pump of the suitable type. You know the situation, I'm sure. If I have a spare pump, I'll never need it. That's why I'm looking for a simple, cheap, preferably second hand, swap over should my pump give up the ghost.