Sun Spot Solar is an authorized distributor for EL-SID circulating pumps manufactured by Ivan Labs. Ideal for closed loop solar systems, instant hot water circulation, radiant floor heating, and injection pumping. These bronze and stainless pumps require no seals and are operated by static impeller drivers having no moving parts. Drivers can be exchanged without removing the pump from the circuit. These remarkable little pumps can be powered directly from low wattage PV (photovoltaic) panels, 12 volt batteries, or AC/DC adapters. Inlet and outlet connections are threaded 1/2" NPT male.

Over thirty years of proven pumping experience!

Pump Control Model 2W2 Delta - a simple differential control to start a pump or pumps based on a temperature difference between solar collector and tank temperature. This control can also be used to start a second slave pump, which might circulate water between two tank based on a temperature difference. Price $86.00