Greetings! First off, I know nothing about plumbing, so please excuse my ignorance. I have a problem with the shower at my house. About 1 year ago, when I would take a show I would notice sometimes that the shower pressure was sometimes noticeably low to the point where it was kind of annoying to take a shower. Then I found out that if the shower pressure was low, i could shut the shower off... turn it back on... and the shower pressure would be just fine. Then about 3 months ago, the "shut off method" stopped working... then a week after that, the hot water would not last very long. I would have to rush through a shower just so I could have hot water the whole time. Needless to say this got old quick, and I quickly started looking up solutions on the internet. My research showed that it was the "cartridge". Every source was so certain that this was the problem and replacing it would fix my problem. So I had said cartridge replaced and as you probably guessed by now, my problem is not better at all. Sorry running you through every inch of the last few months and such... but I figured if I was descriptive enough someone my be able to pin point the problem by some or one of the symptoms. Also note, there is another shower in the house that does not have this problem. The shower faucet is a "Delta Monitor", not sure which series. Any help would be much appreciated.