I wanted to leave a review for this tub filler in hopes that it may help others.  I read a lot of reviews about the scald guard and issues with hot water and this filler.  I started to panic as I LOVE hot showers and baths.  My contractor turned the scald guard all the way to hottest level.  I first tried filling my tub turning the knob all the way to hot.  Only warm water came out.  After reading u some more on Delta’s website, I did an experiment where I turned all the way to hot, and then backed off to cooler.  The water got hot!  Apparently I didn’t fully understand the concept of scald guard - if you turn all the way to hot, that’s where the guard part comes in.  I did several more tries of turning to hot and then backing a little into cold and it appears to be working and hot... let’s hope this continues.  My husband laughs at me because I take showers and baths with water that turns my skin red!