I purchased a home built in the 1900's the main bathroom shower has no water pressure. I did replace the water facet where you lift the tap to start your shower. This worked for awhile but now when lifting the tab water trinkles out of the facet along with the shower head. I also removed the shower head for cleaning but, still there is no water pressure. The other bathroom and kitchen do have water pressure. Another thing is that when someone is taking a shower no can use the water or flush the toilet or else the temperature to the water will change when someone is taking there shower. What can I do to take care of this matter?

 

Welcome to the forums! Have you removed the shower cartridge valve and inspected it for damage? That would be my first avenue. Be sure to turn off the house water first.

 

What is a shower cartridge valve?

 

OK. 1900's gives us a range of 100 years, so narrow it down for us. The tub/shower is operated by a water valve. It may be a single handle valve, or two separate valves named hot and cold. Which one do you have? The cartridges on newer ones can be removed and completely replaced, whereas older ones have washers at the end of stems, which, when turned on, release water to the tub spout. Shower diverters can come in different flavors, too. Some are located on the tub spout and some are between the hot and cold control valves. Which one do you have?
Fill in the blanks, and we'll see about getting you back to 100% water flow.