Hello there,
I please need help on what kind of cartridge this is and if it can be replaced. There is no name on tap or cartridge. Problem started when no hot water was coming from shower. Did some investigating on here and thought I could fix it myself. Took cartidge apart and there was a rubber seal that was no good. When I reinstalled it the water will not shut off. I have no access to the back of shower and there are no valves... so I have to shut main line coming into house. So again can I replace cartridge if there is any replacement and where could I find one, or should I just get a plumber to go through wall to replace tap. I also can't afford much. Also I have pctuers but can't figure out how to put them on here... I am new to this.

Ty Todd

Here are pictures

Try using the little box low and to the right in answer area go advanced all cartridges are replaceable, try to post a picture of the handle and any logo on the cap. moen cartridges - Google Product Search (http://www.google.com/products?hl=en&q=moen+cartridges&um=1&ie=UTF-8&ei=3SfbS-OxIMOBlAfEz7GjAg&sa=X&oi=product_result_group&ct=title&resnum=1&ved=0CCYQrQQwAA) Here are some Price cartridges
http://www.pricepfister.com/Support/Faq/50160000000HbjWAAS.aspx

Go to this web site (http://parts.bdhhi.com/PDF%5C08series-1.pdf)

Looks like part number 974-291. Faucet under warranty to original owner if installed after something like 1997 or 98.

Yep http://public-faqs.s3.amazonaws.com/cartridge-img/974-291(1).jpg