The Bletchley Riddle

SupplyMount 6010 - Aftermarket Replacement Blue Sea M-Series Mini Battery Switch Dual Circuit Compatible with Blue Sea Systems

SupplyMount 6007200 - Aftermarket Replacement Blue Sea Battery Switch Mini - 4 Position - Black Compatible with Blue Sea Systems

SupplyMount 5510E - Aftermarket Replacement Blue Sea E-Series Dual Circuit Battery Switch Compatible with Blue Sea Systems

SharkBite 3/4 x 3/4 Inch MHT Brass Crimp Boiler Drain Valve, PEX Pipe, PE-RT, 25494Z

SupplyMount 701-MDVS - Aftermarket Replacement BEP Dual Operation VSS Switch Cont Motorized - 12v - 275a Compatible with BEP Marine

Replacement Compatible with BEP Remote Operated Battery Switch 275A Cont

Oatey 33917 Standard Pipe Clamp (6 in Polybag), Gray, 3/4-Inch

SupplyMount 3002 - Aftermarket Replacement Blue Sea HD-Series Battery Switch Selector Compatible with Blue Sea Systems