Speakman manufactures many types of showerheads and faucets. By law, Speakman, along with all other manufacturers, are required to place a flow restrictor in showerheads, limiting the water output to 2 1/2 gallons of water per minute. This uses less water but also lowers the water pressure output by the showerhead. If you would like to increase your shower's water pressure, you can easily remove the flow restrictor.
Take the showerhead off the pipe protruding from the wall. To remove, un-thread the base of the head. If you cannot remove it by hand, wrap the base with a rag and use pliers to loosen the showerhead.
Turn the showerhead over and look into the plumbing.
Remove the black rubber gasket inside of the water inlet, using a flat-head screwdriver. Do not use excessive force when removing it, as you might tear the gasket.
Pry the plastic flow restrictor out of the showerhead, using a flat-head screwdriver. The flow restrictor is a circular piece of plastic with several holes around its perimeter. Depending on the model of your Speakman showerhead, the flow restrictor will be either green, white or pink.
Insert the black rubber gasket back into the showerhead and thread the head back onto the pipe. If the gasket is damaged, do not reuse it. Instead, wrap the threading of the pipe clockwise with plumber's tape and thread the showerhead onto the pipe.