4mm Micro Irrigation Tap Adaptor

thingiverse

This is a compact 4 mm pipe micro irrigation adaptor for threaded taps, available in two sizes: 1 inch and 3/4 inch versions. Each adaptable piece consists of two parts, and additional connections are required to prevent water from leaking out. Regarding thread pitch, it's worth noting that while threads for 1" and 3/4" differ according to the Unified Thread Standard (UTS), many garden shops sell both sizes with the same thread pitch, corresponding to the 3/4" standard. This design choice has been made here. To clarify: what I refer to as a 1" tap is actually a 3/4" BSPF (British Standard Pipe, Fine) connection, and what I call a 3/4" tap is actually a 1/2" BSPF connection. There's a distinction between UTS and BSP, where BSP defines a 3/4" thread with a diameter of about 1" and a 1/2" thread with a diameter of approximately 3/4". So far, my 3/4" = 1/2" BSPF adaptor has been successfully tested with an electrovalve without any leakage issues. SLA resin prints have worked well in this case as well.