Dear, where is the pump different, just the thread you said is different, but our pumps are international standard metric threads, from your consultation to placing an order, you did not mention that you need American thread, you need American thread should inform Suzy before placing an order, even if the thread is different, we are actively dealing with the problem, we are willing to send you a adapter, All our pumps are shipped after the engineers test the pumps before they are shipped.

Thank you very much, dear