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.