Tropf Blumat systems need low pressure, much less than comes from normal house water connections. For most systems, the 15 psi/1bar will be the size you're after for outdoor systems. If you're in very small Blumat systems, less than five carrots, we'd recommend the .5 bar pressure reducer. Some of our complete kits include one, but if you'd like to DIY your own kit, you'll need one of these 15 PSI Hose Spigot Pressure Reducers. In gravity systems, you'll also need one if your storage tank is high uphill. In Grow Rooms and Greenhouses with a reservoir for mixing nutrients, you can connect a small pressure pump to this and automatically feed your plants when you water. On one side, it adapts to a 3/4" male hose thread and, on the other, directly to the Tropf Blumat 8 mm supply tube. The maximum input pressure is 87 psi / 6 bar.
