I am going to buy an Iwaki MD 55. Is this good for a closed loop= Also, it s about 5 years old, do they break after such a long time, or should be serviced??? Any comments welcome!!! Thank you.
Iwaki pumps are know to last a long time, they do use more energy than some, but they move a lot of water. I would also look at sequence pumps, well made and are very energy efficient!!
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