Grundfos 15 20 Cil Solar Hot Water Circulating Pump

The Grundfos 15 20 Cil solar hot water circulating pump is the most reliable solar hot water circulating pump we use. They are easy to install and we do try to use them as much as possible in our solar hot water replacement circulating pumps. 

The 15-20 CIL2 can be used as a replacement pump* for all open loop solar systems, both flat plate & evacuated tube types from all major manufacturers. We have listed the major manufacturers below to eliminate some of the guess work as there are hundreds of systems and models.