I have plenty of hot water and pressure but the guy who plumbed my house used pvc and it keeps blowing apart. I replaced everything I could get to that didn't require knocking out walls but I have a male pvc connector going to a female brass connector and when it gets hot kaboom any ideas on a fix?

What color is your pipe, white or yellowish? Can you tell the difference between PVC and CPVC? Back to you.

What is the temperature of the hot water? Did he use primer?

The issue is with the hot water heater, it may be old, which is dangerous and must be replaced or if its not old the temprature setting can be turned down.

Old and dangerous? Where is this coming from? This issue is at a stand still until Duk comes back with some answers.

Well, if the water heater is old you can usually tell by looking at it, if it does not look "old" than it probably isn't. Do you know when the hot water heater was installed. How old is the house. It has happened before where hot water heaters have partially rotted out and blown up. This very rarely happens.