1 inch BSP Spacesaver Bulkhead
The 1 inch BSP bulkhead fitting it a much more compact and lightweight bulkhead fitting to our other options.
However it is perfect for fitting into tanks and drums where you either have a small space to fit or only have a small aperture in the top of your tank / drum.
Fitting should be pushed through from the inside with the washer staying internally and the male thread being on the outside. f you are fitting these to a large tank or the aperature is not large enough to climb inside drill the correct size hole in the side of the tank (list below) and link the opening of the top tank with the hold you just drilled with a length of string. It can be quiet fiddly, might require a bolt on the end of the string to help locate the hole or a large stick to poke it through. Once the two holes are linked with the length of string put the bulkhead fitting threads first with the piece of string going through the middle of the fitting, and while making the string taught let go of of the fitting and it should drop down near the hole. Pull the fitting through the hole and screw the backnut on and then tighten. The washer will create the seal on the inside of the tank.
Size of the hole you need to fit this is 32 mm.
Fitting gives you a male 1 inch BSP thread.