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Estimated dispatch: Fri 9 Oct
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Plastic Bush 40mm Male BSP - 25mm Female BSP. This will allow you to connect the 40mm (1.5 inch BSP) outlets on your grey water tank to a 25mm (1 inch) barb.
Please note: These are British Standard Pipe (BSP). In Australia we use BSP, and like many standards this was not changed over in 1966 when we went to the metric system. As such conversion to metric is not without confusion! These are BSP 1 1/2 Male to BSP 1 inch, but definitely not 25mm due to Nominal Bore (NB), with 1 inch really being closer to 32mm!