My wife has been complaining about our leaky shower, so Saturday i decided to look into it and after doing some research decided I need a new cartridge. Went out and purchased one and got to work. while removing the old one all of the sudden water started spaying from what looked like behind the valve. Called 5 Star and they told me I need to shut off my main water supply to the house. When the technician came out he explained and showed me that these Delta shower valves have 3 little copper tubes which are a bit fragile and when I was trying to get the cartridge out I snapped them. They ended up replacing my shower valve with a new MOEN. Price was very reasonable and tech looked very comfortable doing the job, could tell he knows his job well. Would recommend.