Plumbing Questions? Ask a Plumbing Expert.
Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. First I’ll need some more info so I have a more complete picture of you situation.
What is the model number of the valve you are repairing? I need the valve model not the parts.
If you don't know the valve model then all I can tell you is that most likely you either forgot the o-rings that go in the recess of the pressure balancing part or you used the wrong ones (assuming the new part came with several options). It's the o-rings up against the disk of the valve cap that make the valve tight. I'm assuming you replaced the parts in the same orientation they were originally