Hot Water Circulating Pumps
These are required for forced circulation of liquids within the solar loop of a pressurised split solar hot water system. The casing material is matched to its use, bronze being preferred for direct heating of the water where corrosion resistance is important.
Pump Cross Reference Guide
| Recommended for | Model | Grunfos | Wilo |
| Single Storey Homes | GPD20-5SB | UPS-20-50B | ST20/4 |
| Two Storey Homes | GPD25-8SB | UPS-25-8B | ST25/7 |
Note: This cross-reference is a guide only. Each motor replacement option must be evaluated based on the installation requirements.

