Yeah, this piece of shit starts turning on and off every 10 seconds since yesterday, I've checked every tap and fitting for leaks including the toilet cistern and washing machine taps but nope. It's either a faulty non-return valve or a big leak underground somewhere not visible yet. The geniuses we bought the house from didn't put a valve right next to the pump so I can't shut it off up at the house and turn it back on or I'll risk blowing a pipe somewhere.