Yeah it's what I use, it's expensive and when it goes wrong there is not much you can do as it's a sealed unit,I am on my 3rd and been running over 8 years, have had leaks from thermostat housing,which was filling with water and tripping out, just undid the plate so water can drip out and not build up, but that has stopped leaking now, brass connector on bottom also prone to breaking up, had a mate make another connector for me.other heaters are available, can't comment on those as never tried them.You have same machine as me,although mine has an upgraded 160psi pump