To protect the efficiency of a heat exchanger, they need to be protected from dirt, moisture and debris. These concerns can be addressed by covering the open ports. StockCap offers plastic end caps, vinyl caps, tube end caps, tapered plugs and rubber seal plugs, which work with copper tubing often found in HVAC units. According to the manufacturer, plastic caps and plugs are instrumental in defending heat exchangers from harsh elements. To assist HVAC design engineers, the StockCap website displays the options specific to each major component. The StockCap online store also provides smaller quantities to help during the prototype and testing phases of component design.

StockCap, 123 Manufacturers Drive, Arnold, MO 63010; (800) 827-2277; fax (636) 282-6888; www.stockcap.com.