The Meibes Meiflow TOP S RLB DN 25 pump group without pump is designed to protect the boiler against low-temperature corrosion, which occurs when operating with an excessively cold return. The solution is particularly suitable for systems with solid-fuel boilers, where it helps to reach an operating temperature above the dew point more quickly and reduces the formation of tar deposits. The set is supplied without a circulation pump and includes a three-way mixing valve with adjustable bypass, an actuator with temperature control, two integrated thermometers, a non-return valve, EPP insulation and a wall bracket. The design also allows the flow and return pipework sides to be swapped to suit installation requirements.