Thanks for your reply, and Merry Christmas to you too!! Well from the label, it says cf150, so I am about to call and see if I can replace that lid. ( I did see on some other posts that they said you cannot replace the lid, and I was wondering why. But perhaps those lids blew off and ruined the threads.) You can see the photo where it is screwed on, I lifted the top part where it has broken, and it has not affected the threads below it. I included photos of all three of the mechanics, pump, then the cylinder filter, then the heater. The filter is leaking just a bit from the bottom but I have a bead of silicone caulk around it that helps a little. I don't know if that would cause a pressure problem??