Water Pump Group 3

Hand-washing Station

Katherine Mundy & Ngan-Ha Do





Greensgrow

Who is Greensgrow?a model urban farm and an educator in being sustainable and green

AND

bridges the gap between the city and rural farm



Brief

1. Bike Rack2. Display Unit3. Hand-Washing Station

Design Opportunities



Brief

1. Bike Rack2. Display Unit3. Hand-Washing Station

Design Opportunities

austinkayak.comHapyHands Portable Hand Washing Station

sanisink.comSaniSink’s Portable Hand Washing Station

instructables.comField Sink



Concept Sketches for the Composting Toilet

Concepts




terrarium milk crates wine barrel

Concepts












The Composting Toilet

Surveying the Lot



Surveying the Lot

The Farm



Surveying the Lot

The Resources



Cable Spool

Why a Cable Spool?- Greensgrow has two cable spools readily available- repurposing material, a Greensgrow ideology- stationary but is easily transportable - can be more than just a hand-washing station- provides a communal gathering- can be placed anywhere else on the farm besides by the composting toilet

more importantly, it is a mass volume that isn’t being utilitzed to its fullest potential.....

a design oppotunity we couldn’t ignore



Concept Sketches for Cable Spool

Concepts



Refined Concept

Why?Through the mechanical and technical constraints of the spool, we designed the hand-washing station to be a self-contained unit.

Basic Parts- spool- single spout faucet- miniature sink- pump- storage container- water line- drainage



Mechanism/System

Gusher Galley MKII• Boat Pump• Meant to be stepped on• Durable• Mountable• Pumps 4.3 Gallons of water per minute



Material Research

List of Materials Needed

-galvanized roofing nails 1”-galvnized screws 3 1/2” & 1”-galvanized clip/brackets 1/2”-epoxy-threaded rods-washers-bolts-nuts-clear vinyl tubes 1/4” & 1/2”-black push-on hose 1/2”-whale gusher galley mk3 pump-hose clamps 1/4”-5/8”-hose clamps 7/16”x29/32-metal tape-fernco flexible coupling-rubber gaskets (can be home made)-faucet rosette, washer, & nut-2” to 2 1/2” sink strainger assembly

List of Hardware Needed

-spool-cast fip to mip street elbow 1/2”-plastic slip joint nut and washer 1 1/2”-brass pipe nipple 1/4”x1 1/2”-brass pipe nipple 1/4”x2 1/2”-brass pipe nipple 1/4”x2”-brass pipe nipple 1/4”x4”-brass pipe nipple 1/2” x close-coupling 1/2”x1/2”-coupling 1/2” fip-fip elbow 1/4”-pipe coupling 1/4” fip-pipe bushing 3/8” mip x1/4” fip-pipe reducing coupling 3/4” fip x1/2” fip-house barb adapter 1/2” barb x 1/2” mip-hose barb adapter 5/16” barb x 1/4” mip-swivel hose batb adapter 3/4” fh x1/2” barb-round 20 gallon container-pvc pipe 1 1/4” diameter (outside)-single spout faucet-faucet connector-soap dispenser-pvc garbage disposal elbow

List of Tools Needed

-hammer-screwdriver-pliers-ruler-measuring tape-bi metal hole saw 1 1/2” & 1/2”-hole saw mandrel 9/16”-1 3/16” & 1 1/4”-6”-circular saw-jigsaw-fossi drill bit-drill-drill bits-adjustable wrench-metal grinder-exacto blade-wire/metal snips-masking/duct tape-palm sander-sand paper-dremel-hacksaw or sawzall-caulk gun

Estimated Cost: $320

Materials, Hardware, Tools



Blueprint

How it Works

Drain Pipe

Water to Faucet

Direct Hose Fill

Water Gauge

Water Tank

Stilts

Mounted Foot Pump

Line to Pump

Drain Line

Faucet Mounted Soap Dispenser

Sink



Construction



Construction



Construction



Feedback

- cut down rods, need cap or cover

- algae will build up in the clear tube of the water line

- can arrange plants around bottom of spool

- would be helpful to have quick & easy way to drain water

-sink may be too small, problems with spillage

- drain line can go into ground, not good for gray water to sit

Feedback



Construction



Construction



Construction



Additions

How the Water Line Works:

Where water is fluid, it will always be at the same level.



User Testing & Feedback



FIRST STEPS

The first thing we recommend any builder do first is give the spool a good washing to get anything off of it that might hinder the construction, overall look, or general cleanliness that you might expect from a handwashing station.

You will need:• Bucket• Carwashing Sponge (It will be the easiest to work with, but any sponge will do.)• Dish Soap• Water • Hose (Optional)

Fill the bucket with water and soap. If you have access to a hose, you can rinse the spool off quickly before and after washing. If not, use the soapy water to wash, then refill the bucket with clean water and rinse.

REINFORCING THE STRUCTURE

Cable spools have six metal support rods that run through the length of the structure to keep it stable. These rods are also what attaches the top and bottom to the middle. Since the structure is tension-based, when you unscrew the nuts and take the top off, all of the planks in the middle will fall over. When you have a larger spool, this can be incredibly difficult to put back together, so you must reinforce the center planks.

You will need:• Galvanized Metal Tape• Galvanized Roofing Nails

Wrap the tape around the spool completely. It’s easiest to hammer it flat as you wrap it around. If you’re concerned about keeping the tape parallel to the top and bottom, mark it out in masking tape first. Do this three times.

REMOVING THE LID

Once you’ve secured the middle structure, taking the lid off should be easy, but sometimes it’s not. Many times, these rods have sat out for unknown amounts of time in all kinds of weather - the result being rusty parts. If this is the case, you must use a metal grinder to grind the end of the rod and nut, enough to clear through the rust.

REMOVING THE LID

IF THERE IS RUST

Flip the spool on its side and put a board on either side of each wheel to keep the spool from rolling. One person stands at the bottom end and holds the spool securely while the other person uses a metal grinder to grind down any rust. Once this step is complete, the person holding the spool in place should use a wrench to keep the parts in place, while the person grinding uses a wrench to twist and remove freshly grinded parts. Repeat for each rod.

NO RUST

Flip the spool on its side and put a board on either side of each wheel to keep the spool from rolling. One person stands at the bottom end and holds the spool securely. This person should use a wrench to hold the bottom parts in place, while the other person uses a wrench to twist from the top end and remove parts. Repeat for each rod.

Carefully push spool upright and remove lid. Remove any debris left on the inside.

PREPARING THE WATER CONTAINER

If you can get a large enough spool, a 20 gallon trash can should fit inside. We like the Rubbermaid Brute 20 Gallon because has a flat lid and is sold most everywhere trash cans are sold. You will however, have to cut the handles off the trash can. Every inch of interior space counts.

You will need:• Hacksaw

Using, start slowly and make a mark in the handle to get the cut going. Slice both handles off.

ATTACHING STILTS FOR THE WATER CONTAINER

Since the top of the spool should already be off, carefully remove the center structure and set aside. You should be left with just the base. Cut four 4 inch long pieces from a 2 x 4. You will screw these to the bottom as the stilts for the the container. Mark where you will place them on the spool and set blocks aside. Make the marking below as a guide for where you will pre-drill two holes. Drill all the way through the base of the spool so you can see the holes on the other side. Flip the base now so it’s standing. Have one person hold a block at a time in place, while another person holds the base securely. Using 3 1/2 inch long screws, screw blocks on from the opposite side. (The very bottom.) Repeat for all 4 blocks. Make 8 holes.

You will need: • Power Drill • 3 1/2 inch long outdoor screws • At least two feet of a 2 x 4 (Extra in case of splitting or mess ups)

Instructions



Special thanks to:

Ryan, Dave, Mary, Cheyanne, Megan, Emily - for feedback, modeling, and on site user testing.

Thomas Mundy - for fluid engineering expertise and rides to Home Depot.

Documents

Water Pump Group 3