In a method for producing drip irrigation pipes, a tube body is extruded from a thermoplastic synthetic material and provided with a wall. In particular, the apparatus comprises M inverters, 2M electrical-to-optical converters and a multiplexer. The WSPs, or tenants of the operators, may obtain access in a tenant lease-space model. A power control unit is provided for each of the zones. Here, a local distance of a local metric space is used to generate local search tree branches. A reservoir tank is formed at its lower portion with a projection extending downward and insertable into the hole of the supporting portion and at its upper portion with a first and second ear portions insertable from above into the first and second clip portions, respectively.