Hey guys just bought a used thermal wave ii and its missing the 180 degree thermal valve right under the water box. Long story short I decided to run the machine with out it and test water pump. I turned the heat off so I wouldnt damage the pump. When engaging the water pump I get no pressure reading. I installed a new gauge bc the previous one got damaged in shipping. Machine cuts off after 5 seconds do to no pump pressure. I have determined the clutch works properly bc it does ingagae and spin the pump. Maybe I have it plumbed wrong? Could it be the pressure regulator is bad? I even tried direct feeding the pump with a water hose with pressued turned down really low. The part I'm missing is part number 15 and I dont want to pay 450 for a new one. Can I bypass it?