Compression Fitting› 7688421 KIT PCB for Baxi, Main, and Potterton Combi & System Boilers -Genuine. Baxi Boilers : 624 Combi (GC No. 47-077-28), 630 Combi (47-077-29), 636 Combi (47-077-30), 818 System (41-470-73), 824 System (41-470-74), 825 Combi (47-077-38), 830 Combi (47-077-39), 836 Combi (47-077-40).
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