Do you know someone whose sprinkling system has not been winterized or serviced by Flier’s before or could use a new lawn sprinkling or water filtering system? Refer them to Flier’s. When they call, make sure they mention you’re the one who referred them to us. We’ll send you $20 to $50 for each referral. $20 Reward for referring a new service customer. $50 reward for referring a new lawn sprinkling customer. We also have a $20 to $50 reward for referring a new water system customer. It’s that easy.