Caleffi Hydronic Solutions has released its May 2009 Solar Components Price List . The list includes 34 new products, including fittings for connecting to other brands of solar products, delta T controllers for drain-back systems, DC solar pumps and DC delta T controllers, high-head pumping stations for commercial applications, and a heat metering controller with flow meter.Caleffi - Creating innovative, superior performance products that help customers live comfortably and economically, while softening their impact on the environment.