Spray bottles are iconic household items. Whether you are spraying cleaners on a counter top or misting water on your plants, they are quite useful but they have some limitations. They can only operate when the end of the suction tube is submerged in the liquid. They have no problem as long the bottle is full and held upright. But if the fluid gets low or if you try to spray something at an angle, the sprayer might stop working. So, I figured out a simple modification that will let them function in any orientation.
By replacing the hard suction tube with flexible tubing and adding a weight to the end of it, the suction tube will naturally fall to the lowest point of the container. This will allow end of the tube to stay submerged regardless of how the bottle is positioned. Here's how to make it.
Step 1: Materials
Flexible Tubing with 1/8" inner diameter (such as aquarium airline tubing)
5 x 1/4" Stainless Steel Nuts (or other weight)
Step 2: Cut the Tubes to Length
Step 3: Attach the Two Cut Tubes
If the two tubes do not make a good seal, you can use glue or caulk to help hold them together. If you need to use adhesive, first make sure that both tubes are clean and dry. Apply a thin layer to the bottom half inch of the rigid tube. Then slide the flexible tubing onto the rigid tubing. As you do this, slowly twist the tubes to help spread the glue evenly. You will want them to overlap by at least 1/2". Let the adhesive completely cure before continuing.
Step 4: Attach the Weight at the End of the Suction Tube
The number of nuts that you will need to use will be determined by the stiffness of the flexible tubing. You want there to be enough weight on the end of the tube so that when the sprayer is turned upside down, the end of the tube will hang near the level of the screw cap. Twist nuts onto the end of the flexible tubing one at a time. After adding each one, turn the sprayer upside down and check how low the end of the tube hangs. This is the minimum level of liquid that will still submerge the end of the tube when held upside down. Continue adding nuts until you are satisfied with this level. I used five nuts in my prototype.
Step 5: Finished Spray Bottle
Occasionally the weight or the tube may get stuck in one position. If this happens, just give the bottle a gentle shake and the weight will fall back down to liquid.