How to Install a Foam Spray Machine

Remove everything from the room; the room must be empty, including the walls.

Cover all windows, doors, bathtubs, toilets and sinks with plastic sheeting. Put a layer of plastic sheeting on the floor to protect the flooring.

Measure the room in which you will be spraying. Consult the owner's manual of the spraying machine to determine the length of the hose. Sit the foam spraying machine in a location within the room from which the length of hose can reach every wall. Put a drop cloth underneath the sprayer.

Connect the sprayer's power supply to an outlet. If the sprayer does not have a built-in air compressor, follow the manufacturer's instructions and connect an air compressor to the sprayer. Each sprayer is different, but the air compressor hose is often connected to an air intake valve located on the sprayer. If you are using an external air compressor, connect the power supply to an outlet. Use extension cords if needed.

Place a plastic bucket on each side of the sprayer. The sprayer may come with plastic buckets. If so, use the ones supplied with the machine.

Mix the proper ratio of chemicals using the manufacturer's instructions, using an agitator such as a mechanical drill with a blade attachment to stir. Do not use the same agitator to mix both chemicals. Mix the chemicals in the correct bucket. One side of the sprayer intakes chemicals from the bucket. The other bucket is a waste bucket to catch leftover foam. Consult the owner's manual for bucket placement.

Turn the knobs on the control panel to "Recirculation Mode," then turn on the pump to power on the sprayer. The function knob needs to be in the "Stop" or "Off" position, or else the machine will begin to mix the chemicals.

Turn the sprayer to the lowest recirculation setting. The chemicals will begin to fill the tubes and mix. Let the sprayer run until a consistent amount of both chemicals are flowing through the tubes. Stop the pump, but do not power it off.

Disconnect the manifold from the spray gun and drain it into the waste bucket until it is free of any chemicals. Reconnect the manifold. Adjust the flow knobs on the sprayer until the pressure, which is registered in pounds per square inch (PSI), matches the specifications of the machine. Consult the installation manual for pressure settings.

Turn on the air compressor and open the air valve on the sprayer gun. Connect the tip to the sprayer gun.

Open the manifold valve on the gun with an adjustable wrench. Disengage the safety mechanism on the rear of the gun by following the manufacturer's instructions. Drain the gun into the waste bucket. Close the manifold.

Aim the spray gun into the waste bucket. Squeeze the trigger until foam shoots out. Test the spray on a piece of cardboard and make sure it sprays continuously and evenly.