*By participating in the Plumb Pro Referral Program, you agree that referees must be first time customers who book and complete a service within 30 days of submitting the referral form. Once the service is completed, both the referrer and the referee will receive a $25 gift card. Please allow up to 30 business days after appointment completion to receive free gift. Each referrer may earn up to $600 per calendar yea. Referrals missing required information, self referrals, or canceled services do not qualify.