I have a Ferroli Modena 80E which is in need of a new pump. The current unit is a Grundfos 15-50 A0 with what looks like plastic couplings with a retaining clip. Is there anything unusual (i.e. is the A0 relevant?) about this unit that would prevent it being replaced with another Grundfos 15-50 (or similar 130mm pump) or is it a straight swap?
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