You’re never meant to see white sand coming from a sprinkler. In the case of this customer they had an old style well. The screen had failed which allowed in sand. It is very white sand that comes from water bearing ground that is washed almost iridescent over the years. Unfortunately no option but to either redrill a spear into the existing well or drill a new submersible bore. It was more economical here to opt for a new submersible water bore. Virgin Bores can help with any bore problem in Perth. Call is on 92460111.