Will fit: POTTERTON KINGFISHER MF 40 RSL BOILER. POTTERTON KINGFISHER MF 50 RSL BOILER. POTTERTON KINGFISHER MF 60 RSL BOILER. POTTERTON KINGFISHER MF 70 RSL BOILER. POTTERTON KINGFISHER MF 80 RSL BOILER.
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