Grundfos UP 15-14B PM 8W COMFORT Basic circulator pump
The Grundfos UP15-14B PM comfort basic is the new version of the UP15-14B. It is very similar but with a few modifications. New for old replacement of the circulator pump is easy with the new Grundfos UP 15-14 PM.
When considering choosing a solar hot water circulating pump based on the pumps head:
The head rating on a pump is a static rating, and applies to the maximum head in an open loop system, such as pumping up to a roof tank. In the case of circulation through a roof panel and back down a return line, once the system is primed the weight of water falling down the return line is equal to the weight of water in the feed line, and essentially the pump only needs to overcome the total pipe friction in the system. When you take this into account the limitation is more to do with pipe length than the height. The Grundfos 15 14 B PM can be used as a replacement pump* for all open loop solar systems, both flat plate & evacuated solar hot water systems. Below we have listed the major manufacturers to assist you in your circulating pump selection.