Plumbing Questions? Ask a Plumber and Get Answers ASAP.
Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. If my initial response doesn’t answer your question then let me know and we can continue our conversation.
You could have a dirty piston seal or the small ho,e in the piston could be clogged. Below is a link to the manual. Instruction to clean the piston are on page 8