1. Worldwide countries suffering water scarcity2. Water consumption among worldwide countries3. Water saving electric shower4. Toilet flush saving products5. Grey water diversion system6. Rainwater collection system (Melbourne)7. Customer analysis

Literature Review

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Concerns when purchasing H2O Care

Cost

Water bill saved

Volumn of Water saved

Quality of water saved

Eco friendly

Product size

Having water recycle habit

and reason

Yes, eco friendly

Yes, money saving

No, inconvenience

No, not hygienic

Willingness to save water

Yes No

Acceptability of recycled water for

Toilet flushing, Floor cleaning and Irrigation

0

10

20

30

40

50

Toilet flushing Floor cleaning Irrigation

Usage of recycled waterP

eo

ple Yes

No

Expected price

< $700

$700-$1000

> $1000

Expected water

bill saved

< 10%

10% - 20%

> 20%

Expected volume

of tank

< 10 L

10 L - 20 L

> 20 L

Customer Analysis

Filter mode

• Water diverted to

tank through filter

• Water stored in tankBackwash mode

• Turning the cylinder 120o

• Water diverted to drain through an

inverted filter

• Dirt removed from filter to drain

Drain mode

• Shifting the

cylinder forward

• Water diverted to

drain without

passing filter

Concepts

Drain mode

• Water diverted to drain without passing filter

Filter mode

• Turning the cylinder 60O

• Water diverted to tank through filter

• Water stored in tank

Backwash mode

• Turning the cylinder further 120O

• Water diverted to drain through an inverted filter

• Dirt removed from filter to drain

Refinement 1

Drain mode

Filter modeBackwash mode

Prototype of switch(Rapid prototyping)

Water diverting Test• No leakage of water• Smooth water flow

Refinement 1

Features

• Filter embedded in a plastic holder

• Rubber provides water proof function

Improvement

• Better support

• Vertical water outlet to drain

• Filter can be taken out easily

Refinement2

Tank

User friendly

• Detachable tank body

• Wheels and handle

Hygienic

• Secondary filter

Low density PE• Flexible

• Water-proof

• Smooth

Extrusion blow molded• No under cut

• Reasonable thickness

User friendly• Detachable tank body

• Wheels and handle

Hygienic• Secondary filter cavity

Final Design

Automatic system

Turn onFilter Mode

Back toDrain Mode

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Automatic system

• Easy operation

Final Design

Below yield stress Observation• Water flew smoothly

• No water stagnated

No choking • Cross section area is almost constant

• By Bernoulli’s principle, water velocity is stable

Drop Test Water flowing test

Testing