DIY Home Fire Extinguisher

1. 2 Home Fire Extinguisher Kits, which include:
   • 1 Water tank
   • 1 Heat Shield
   • 2 Plastic tank clasps
   • Nozzle & metal nozzle attachment
   • Plastic nozzle aiming system
   • 1 section of flexible tubing
   • 2 sections of rigid tubing
   • 1 shut-off valve
   • 1 pump
   • 1 battery pack
   • 1 electrical cable
   • 1 DC power adapter

2. PVC tubing, a total of 9.6 m in length (a diameter of 1 inch is recommended) of the following sizes:

• 10 200 mm lengths
• 4 185 mm lengths
• 8 260 mm lengths
• 8 70 mm lengths
• 6 315 mm lengths
• 2 277 mm lengths
• 6 120 mm lengths

3. PVC connectors, according to the diameter of tube chosen:

• 8 90 degree elbows
• 4 tee joints
• 18 3-way elbows

4. An adhesive, such as gorilla glue

5. 3/8" plywood, of the following sizes:

• 2 x 225 x 165 mm
• 2x 260 x 165 mm
• 4 sections of 310 x 60 mm
• 370 x 310 mm

6. Heat resistant paint

7. The following screws:

• 16 3/4" long #8 self-tapping screws

8. A M5 drill bit

Cut the PVC and plywood you have purchased into the sizes indicated in the materials list. Cover the wood in two coats of heat resistant paint.

Prepare of the 200 mm PVC pieces by drilling two holes in it with a clearance drill for M5 screws. Slide the two tank clamps onto it; center them along its length. Mark the spot where the two screws pass through the PVC, and drill holes for them. Attach the clamps to the PVC using two M5 screws. Mark both sides of the PVC, don't attempt to drill straight through the tube, to ensure the hole is straight across. Repeat for another 200 mm piece of PVC.

Gather the following PVC pieces and connectors:

• 4 260 mm lengths (AE,BF,CG,DH)
• 4 70 mm lengths (AI,ID,BJ,JC)
• 5 200 mm lengths (AB,DC,EF,HG,IJ)
• 2 185 mm lengths (EH,FG)
• 8 3-way elbows (A,B,C,D,E,F,G,H)
• 2 tee joints (I,J)

Note that it may be beneficial to put together the structure first, then take it apart to glue it together, in order to ensure you have the pieces put together correctly. It is also recommended to label the joints and the tubes, similar to in the image

See the image above. Make the rectangular bottom first. Use two 200 mm pieces and two 185 mm pieces, as well as 4 3-way elbows, to create a rectangle. Glue these connections together. Then, glue a 260 mm length vertically upward into the last opening on each 3-way elbow at the corners of the rectangle you have just made.

Next, create the member that will span across the top of the removable unit. Take both 2 joints. Glue the middle opening of the tee joint to each end of the 200 mm piece you attached the tank clamps to, so that the cross members of both tee joints are parallel to each other.

Next, make the top. Take a 200 mm piece, and glue a 3-way elbow to each side. In the opening on the 3-way elbow on each side of this piece that is in the same plane perpendicular to it, glue a 70 mm piece. Onto the end of each of these pieces, glue one opening of each tee-joint of the member that spans across the top tat you prepared earlier. Ensure the tank clamps are hanging down, parallel to the downward facing openings on the 3-way elbows.

In the last opening of each tee joint you have glued on in the last step, glue another 70 mm length. Onto the end of these 70 mm lengths, glue a 3 way elbow. You should then be able to glue the bottom opening of the 4 3-way elbows in the corners onto the 260 mm vertical lengths attached to the bottom. Glue a 200 mm length between the last two openings on these 3-way elbows.

Repeat this step for the second removable unit.

Gather the following PVC pieces and connectors:

• 2 275 mm length (NR,NR')
• 6 120 mm lengths (KM,LN,OQ,PR, O'Q',P'R')
• 6 315 mm lengths (KL,OP,MN,QR,Q'R',O'P')
• 2 3-way elbows (R,R')
• 8 90 degree elbows (K,L,O,P,Q,Q',P',O',)
• 2 tees (N,M)

It may be helpful to assemble and label each joint, then take apart to glue everything together

Glue a 3-way elbow onto each end of the 275 mm length. Into the vertical opening of each of these elbows, glue a 120 mm length. Into the last opening on the 3-way elbows, glue a 315 mm length. At the end of this 315 mm length, glue a 90 degree elbow with the perpendicular opening pointing up. Into each of these vertical pointing openings, glue a 120 mm length.

Take two 315 mm lengths. On each end, glue a 90 degree angle, with the perpendicular opening pointing in the same direction on both ends. Glue one of these onto the two pairs of vertical 120 mm lengths, as shown in the image above.

Take the 370 x 310 mm wood piece, and screw it to the two bottom 315 mm lengths of the base, as shown in the image, with 3/4" long #8 screws, one in each corner. Ensure you are drilling into the PVC and not the edge of the elbows, so you may need to offset it a bit from the corners of the wood piece.

Note: you can drill pilot holes in the PVC ahead of time for ease

Take the 260 x 165 mm piece and connect it to the bottom of the removable unit, attaching to the two 200 mm lengths with 3/4" length #8 screws.

Take the 225 x 165 mm piece and attach it to the outside of the back of the removeable unit - using two 3/4" length #8 screws, screw the top two corners of this piece into on of the 200 mm pieces along the top of the removeable unit - this is the back plate.

Take the heat shield and attach it to the outside of the front of the removeable unit - i.e. on the side directly across from the back plate you just attached. Use 4 3/4" long #8 screws to connect it at all 4 corners.

Repeat for the second removable unit.

Shown here is the nozzle aiming system. To assemble, push the two halves of the rack together and bolt with the two provided M2 bolts.

Assemble the metal nozzle adaptor onto the large gear with the three provided 10-24 screws.

Push the two gears onto the appropriate axels.

- antifreeze

Mount the pump to the outside of the back panel of the removeable unit using four 3/4" #8 wood screws.

Mount the provided battery box onto the back panel with four 3/4" #8 wood screws.

Run velcro along the base of the tank and the bottom plate so that they match up.

Place the handle of the tank in between the two halves of the tank clamp and fasten with the provided M2 bolts. Then fasten the loose half of the clamp to the PVC, through the pre-drilled holes.

Connect the nozzle, elbow, and pump outlet with the rigid tubing by pushing onto the provided barbed fittings, and securing with hose clamps.

Connect the inlet of the pump to the tank through the sealed hole in the tank lid using the flexible tubing, and secure with a hose clamp around the inlet.