I have a Whalen Company 2 ton water source heat pump that is in a high rise condo. The unit is sunk in the wall and unservicable. I took the unit to the shop and created a simulated enviroment to service the unit. I came to the conclusion that there was a restriction in my strainer or in a cap tube. I have never done a cap tube replacement. I contacted the manufacturer and they told me the unit has 3 32" .060" cap tubes but the parts houses only carry 5 sizes, the closest being .064". This tubing came with a sizing chart that sizes the tube off of the hp of the conpressor. They recommend putting in 81" of .064" cap to replace my 32" of .060". This seems like a major increase to me. I understand that I have to go longer due to the bigger diameter but I feel that 50" more is excessive. The thing that troubles me is that they only size the tube off of hp and no other factors so I am a little hesitant to put that much more cap tube in there. I am curious as to other experiences that people have had replacing cap tubes with another size.