Use the Male &Female BSP Threaded sockets to connect any BSP screw fittings to create further modifications to your bespoke irrigation system. The measurement of these fittings refers to the internal diameter of the required pipework. For fittings that are both barbed and BSP refer to the barbed as external diameter. So in case of a fitting with 16mm external diameter, it will be 13mm internal diameter.
The 5mm (external diameter) fitting will fit perfectly onto any 4mm internal diameter pipework. Barbed solid plastic connections ensure a strong and secure grip on your pipework. No tools are required as they just push into your 4mm pipework, these are typically used in in drip systems, homemade hydroponic irrigation systems and can also be used outside to water hanging baskets, pots and raised beds.
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