What are the parts of the water supply and drainage system of the property?

Water supply: pool, water pump, water supply pipe and pressure reducing valve, roof water tank, control valve, etc. , no roof tank, with variable frequency water pump. The drainage system is divided into rainwater and sewage systems. Rainwater is discharged from ditches, drains, open ditches, sewers and sewers, and sewage is discharged from sewers, sewers and septic tanks. The septic tank where rainwater and sewage meet must undergo secondary biochemical treatment before it can be discharged into the rainwater pipeline.

The underground garage has a drainage ditch, a collecting well, a drainage pump and a rainwater pipe.