Blumat systems need low pressure, much less than comes from normal house water connections.
In gravity systems, you will need a pressure reducer 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 Blumat 8 mm supply tube. Maximum input pressure is 87 psi.
The pressure reducer is permanently set at 1 bar (for the pressure of normal water pipes), includes a connection for the 8 mm water supply tubing - (you might need an adapter to connect to your tap, available from any hardware store)