Review on Pfister 9740420: High-Performance Pressure Balanced Valve Cartridge Sub Assembly by Doug Hammett

Our shower had intermittent hot water, we replaced the old valve with this one and it solved our problem. Much cheaper than plumbing and very easy to install, only takes about 10 minutes. I turned off the main faucet to the house, removed the shower handle and then removed the decorative panel and then removed the four screws in the old valve that just popped out. I entered a new value and reused the metal disc from the old valve. Now it works great.