But the Grundfos 15-42 bronze pump has a number of drawbacks:
require filling before starting;
have a tendency to cavitation;
have low value of efficiency when pumping viscous liquids;
have a small value of efficiency at low liquid flow Q and the importance of head H, etc.
Grundfos 15-42 pump should be used for large liquid flow Q and the low and medium head of liquid N.
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The Grundfos UP15-42B5 (59896145) 1/25HP Bronze Circulator Pump with 1/2″ Sweat connections.
This maintenance free Grundfos Circulator Pump is for open systems with Maximum liquid temperature 230 F.
Grundfos UP15-42B5 Features: