what size drill bit and tap do i need to make threads to install the by-pass vavle?thanks
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what size drill bit and tap do i need to make threads to install the by-pass vavle?thanks
grodri1972, do you have a steel discharge tube? Don't your inlet already have threads in it for a fitting? If indeed you have a steel discharge, or (aluminum) you will probably have to drill and braze in a bung for a fitting. On the inlet side I have seen guys drill and epoxy a fitting in if the inlet don’t already have a place for the fitting. The size of the fittings would depend on how large the hoses are from the bypass valve.