One of the guys from the John Bridge forum recommended this site to me. I just finished a full bath remodel and instead of replacing the whole valve, I only replaced the cartridge (don't pour salt on the wound, I already regret the decision but I followed some bad advice...). I put in the new brass cartridge and now the shower head leaks. At first it only leaked approx once per hour, but after a week of use, I have a steady drip. I can replace the cartridge again if need be, but I want to make sure that is the probem before I go that route. When I installed the new one, I rubbed a bit of soap on the o rings so it would slide in a little easier, not sure if this was a good idea or not. Any opinions on this, or any tricks I should be aware of? Also, what is the difference between the 1200 and the 1225 as they seem to be interchangeable. Thanks in advance for any advice.