What temperature F does water freeze at 65 PSI ??? I looked this up online but all I find is stuff I already know and lots of advertisements. It makes me mad to clink on a link that forces me to look at an advertisement and when I try to click to leave it will NOT let me leave. All I have learned so far is what I already know, water freezes at 32 deg F, highest density is 39 deg F, only substance know that can exist in all 3 states, gas, liquid, solid. A soft drink will freeze at 29 deg F. Water freezes at 2 bars. Water boils at 70 deg F in a vacuum. Flowing water will not freeze at 32. SO WHAT!!! What I need to know is how does pressure effect the freezing point of water. There has to be a formula to calculate this? Water pressure in my house is 65 PSI at what temperature F will water in the pipes freeze?