Page 1

howe / hild @ uarts

hand washing station


Original project brief

“We want a hand washing sink that is operated by foot�


our mission statement/direction

Accessible materials (pick one universal source) Replicable Inexpensive (set a price limit) Provide instruction sets for how it’s made Educational (learn by doing/using, diagrams) Freestanding / not requiring existing structure Preferably self contained system


refined definitions

Portable We want the unit to be mobile, which will allow for more flexibility in use, eg. events, demonstrations, farmers market.


refined definitions

Inexpensive The unit should cost less than $50 when made by the user. The parts are all easily available at big box hardware stores.


refined definitions

Easy Maintenance Should something go wrong, we want it to be easily diagnosed and fixed by the user. No outside help or speciality knowledge required.


refined definitions

Simple Set Up With detailed instructions, diagrams and explanations the user should be able to fabricate their own hand pump system. None of the connections or components are overly complicated.


refined definitions

Hygienic A pressurized pump means that water is on demand, no hands required. Simply press the foot pedal for a controlled stream over the basin.


refined definitions

Replicable Low cost and easy set up makes multiple units an option so more than one person can wash up at one time, in more than one location.


initial research


initial research hardware store


mechanism research pestaside pump

“5 minutes of continuous spray!� = no constant foot pumping


mechanism research pestaside pump

pump ran for over 8 minutes on one pumping easy pour spout


1. Pump the handel to charge

2. Forces air into container

mechanism research how it works

3. Water released in fine mist by pressing button


mechanism research installed with larger reservoir to make the mechanism more DIY

seemed flimsy and did not hold pressure well enough


initial model why use this product

reduces water use lightweight/portable CHEAP ($14.95) readily available strong (seamingly) durrable plactic


initial model sketches self­ —contained unit designed around the round up pump


initial model sketches self­ —contained unit designed around the round up pump


1st feedback / crit initial model

wont hold enough water loved the pressure style of pump breaks easily would like it larger


1st feedback / crit initial model

“We like the pressure, it would get dirt off your hands. But the RoundUp pump breaks easily” “It would be really great if you could make it larger”


exploration of larger pressure tanks food manufacturing sprayers, etc.


exploration of larger pressure tanks food manufacturing sprayers, etc.


NEW focus! farmers market

temporary (only a few hours a week) defined location and users


temporary means there might be a spare hose, and no need to have a reservoir


NEW mechanism hoses

hoses = pressure


2nd form iteration hose + single pipe


2nd form iteration hose + single pipe


2nd form iteration hose + single pipe


2nd form iteration first model in pipe


on site testing first model in pipe


the farmers market more specific location


refining the pipe model problems with stability

greensgrow only has 4" of topsoil single pole not very sturdy needed a different basin


designing around a sink? how to adapt our system to an existing utility sink


double pipe model abandonment the sink in favor of a more streamlined version


double pipe model version 2


double pipe model #3 constructing a fully functioning prototype for greensgrow


double pipe model #3 how this self contained model works

OUT

IN


double pipe model #3 parts 1/2" galvanized steel T­ —joint

3 1/2 x 1/2" galvanized steel pipe

1/2" galvanized steel nipple (2x)

1/2" galvanized steel T­ —joint (2x)

1/2" galvinized steel floor flange

1/2" galvanized steel elbow (2x)

2 1/2" galvanized steel nipple garden hose to 1/2" pipe connector 5 x 1/2" galvanized steel pipe

1/2" galvanized steel T­ —joint

1/2" stainless steel self closing valve

26 1/4 x 1/2" galvanized steel pipe

12 x 1/2" galvanized steel pipe 8 x 1/2" galvanized steel pipe

30 x 1/2" galvanized steel pipe

1/2" galvanized steel elbow

1/2" galvanized steel nipple


prepare your tools:


following manufacturers directions, fill two 1/2" nipples, and one 2 1/2" nipple. allow to set.


Make sure to tape all joints when assembling


one nipple has epoxy plug


possible options for the basin:


base for final model parts

parts used:

12" x 6" x 3/4" Plywood (4x)

12" x 24" x 3/4" Plywood (2x)

Large door hinge

1/4" Screws (5x)

1 1/2" x 1/4" bolts (8x)

Standard wood screws (21x)

Washers (16x)

5" metal chain

1/4" nuts (8x)


installation at Greensgrow for the farmers market

it works! the base should be sealed needs a better chain hose leaks a little people looked intrigued needs signage to explain soap / towels


further steps where else is this applicable?

community gardens other urban farms temporary events farmers markets home use / personal gardens


instruction book parts used: 3 1/2 x 1/2" galvanized steel pipe

1/2" galvanized steel T­ —joint (2x)

1/2" galvanized steel elbow (2x)

2 1/2" galvanized steel nipple epoxy plug here

parts used: 5 x 1/2" galvanized steel pipe

1/2" galvanized steel T­ —joint

26 1/4 x 1/2" galvanized steel pipe

12 x 1/2" galvanized steel pipe

1/2" galvanized steel elbow

1/2" galvanized steel nipple


our mission statement/direction repeated

Accessible materials (pick one universal source) Replicable Inexpensive (set a price limit) Provide instruction sets for how it’s made Educational (learn by doing/using, diagrams) Freestanding / not requiring existing structure Preferably self contained system


thank you.

Water Pump Group 2  

Emily Howe Megan Hilde

Advertisement