I'm on top two floors of 4 story townhome. The water heater and plumbing are in the cellar of the building. The water pressure in the bathrooms is painfully low. The toilet flushes dismally, the shower is not invigorating, and the tub can't even produce enough pressure to make a bubble batch for my kids. I have to swish the water with my hands after filling the tub!
Can I do anything to remedy this? Is there anything I can purchase and apply myself to give immediate results, at least for the tub and shower?