Home › Forum › Ask A Member › HD-25 Running hot › Re: TN-25 Running hot
July 25, 2015 at 11:01 pm
#20871
So which do you have, a TN-25 or HD-25? Check the area where the water tube sticks down into the pump. There is a thick rubber seal there that has a habit of closing in over the end of tube, restricting water flow. Carve that obstruction away and try it again.
A TN does have a tell tale, a small hole drilled in the brass water pipe elbow.