Generally speaking, the standby pump should be set to follow the following principles:
1. In the case of reducing the amount of water is not allowed, there should be two sets of spare units;
2. Allow a short period of time to reduce the amount of water supply, the standby pump only to ensure the supply of water for the accident;
3. Allow a short period of time to interrupt the water supply, can only be set up 1 sets of spare pump;
4. The city water supply system in the pumping station, generally only a spare pump, the pump is usually the model can be and the biggest chestnut stand in the work of li;
5. When the water tower in pipe network and pumping station within the unit more, also can consider adding a standby pump, its model and the normal operation of the pump.
6. If the water supply system has enough high volume of heights of water tower, replacing all or part of the pumping station for water supply in a short time, Li station can device pumps, only in the warehouse storage a standby unit can be.
It is worth to note that the standby pump and other working pumps, should be at any time can start the state.
