Gate Valve Mod Kit and Pump

I submitted a question and received confirmation by email with ticket #REO-KHSMV-721 but no answer yet. It involves the Mod kit and any other necessary parts to convert my NWB 150 which has a tube for water level adjustment with the gate valve. Also I need a new pump. Can't read the P/N on mine. Is the recommended pump for the NWB 150 the OTP 2000GT. Thanks