The above mentioned pump by-pass does not contain a pump, that must be chosen for the installation depending on the building height. The set protects the pump during break in the electricity supply. In such a situation, the water can circulate through the pressure differential valve of the set. The valve can be mounted on the water outflow and on the water return as well. It has to operate in the vertical position.

The set comprises of:
- pressure differential valve - 1pcs
- black inflow - 2pcs
- black outflow - 2pcs
- ball valve - 2pcs
- zinc-coated fitting - 1pcs
- W-Z elbow - 2pcs
- filter - 1pcs
- zinc-coated couplings - 2pcs