Usually this is done with copper, but I was thinking of using plastic, similar to what is used in radiant floor heating. The same material is also used for geothermal heaters for the coolant, so I know it has very good pressure characteristics, and better in-ground properties than copper. The flexibility of the material would make it much easier to install than copper, and it comes in 100+‚Äô lengths. However, I am not really sure what will happen when it is used with #2 heating oil, and in this situation the oil would be drawn through the tubing, so the tube would basically be under a vacuum.
Does anybody have any knowledge on this proposal? Does anyone, perhaps, have an opinion with oil-fired pool heaters in general?
PS: the heater is rated for the fuel draw of 100‚Äô distance from the tank with a ¬Ω" line, in case that raises a concern.
Thank you in advance.