MacDonald Supply is a distributor of high quality plumbing, heating, and industrial supplies. Our products are used in new construction, remodeling, renovation and maintenance applications. The savings are automatic. No claim form necessary. Pay as invoiced. Each quarter your rebate will be calculated and issued as a credit to your account automatically. Rebates will be calculated from orders that were placed on the website (www.macdonaldsupply.com) during the effective quarter.