Anti Rain flood system - Arduino water pump Automation

Been having some trouble at home due to a poorly designed water drain, heavy rains just put at risk overflowing with the drains capacity, I got some problems after getting some water inside my house so I took matters into my own.

The idea is to have and automated system to drain the water out of the "warning zone" out to another place, another idea is to harvest this water if you have the place to store some big containers.

Target: have a fully automated system that can measure the water level and in case the level is near the "warning" level, it activates a water pump to lower the level. As a secondary target the idea is to see the level in real time through a web page.

Bill Of Materials:

Item	Pictures
Arduino (using UNO, will port to pro mini)
Network shield ENC28j60
Distance measuring module HC-SR04
5v relay module
Old wireless repeater DLINK
Water pump 1/2 horsepower
Enclosing box
Power cord & extension
Hose & quick connectors connector
Pvc tube
Ping pong ball
General materials: glue, soldering iron, electrical tools

Here are basic schematics for this project:

Tube assembly:

Block Diagram:

Phases for this project:

Phase 1: get the basic software working. Code the basics for the arduino to measure the distance and upon threshold, activate relay.

Phase 2: building the container for outdoors. Using an hermetic plastic container (a big tupperware :) ), fit all the parts in there, water proofing it, build the pvc tube with the sensor container.

Phase 3: initial testing, a data analysis.

Phase 4: attach wireless repeater in client mode, using network module to: monitor system from web, upload measurements information to mysql database.

Stay tuned for how the project evolves.