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Hey ScottI have the Bell and Gosset nrf-25 3 speed pushing 180 ft from my basement back to the boiler through a sidearm, a HX, and a whole bunch of 1" copper 90's. According to my spinning flow indicator it's working great. I got them on E bay for $90 each with free shipping. 1 for the house, 1 for the shop and a spare on the shelf.