I wish I had known about this sooner! Changed out my cheapo water pressure reducer to this one and boy could we tell the difference when taking a shower or filling the dog's water bowl or doing dishes! 20-30% increase in water flow doesn't sound like much, but it really is a lot. Planning to purchase another one to have on hand just in case. I am still using the other old one on the black water flush connection, but plan to change that one out as well.