I cleaned the dirt and cement splatters off the sewage basin 2-part metal cover which revealed several rust blisters under the original paint. Liberty Sewage Pump LE70 Series – Bottom View Basement Bathroom Sewage Basin The pump empties the basin in 3 seconds or so. It runs vibration free but does make a noticeable “Rrrrrrr” noise when it pumps out the sewage basin. A cast iron impeller rotates at 1725 RPM inside the housing. The intake opening is shown here on the bottom of the pump. Given that I only have a shower that uses ~7 gallons per minute, 1.6 gallon per flush toilet and a normal size sink faucet it will be impossible for the inflow volume to exceed more than 10 to 15 gallons per minute worst case. “Head” is the vertical number of feet, including friction losses for plumbing elbows, that the pump must lift the sewage. This pump is rated at 60 gallons per minute at 20 feet of head for my situation. The water level should never rise more than half-way up the side of pump housing before the pump activates to empty the sewage basin. Basement Bathroom: Liberty Sewage Pump Model LE71A2 As the water level rises, the metal ball in the float switch rolls and closes the on/off switch contact to turn on the pump. In the following photo the pump is shown with the gray mechanical float switch and white 2-inch threaded PVC pipe adapter on the discharge outlet. Consult the Liberty Pump Engineering Specifications to size a pump for your particular needs. I could have gotten by with 1/2 HP pump but chose the 3/4 HP model for added reliability because I don’t want to open the sewage basin and pull the pump – that would be dirty job. I bought a new Liberty Pumps Model LE71A2 3/4 HP sewage on for just $299.00 – compare this price to $975.00 for the same item at Grainger. This project is continued from How to Finish a Basement Bathroom – Part 8. How to Finish a Basement Bathroom: Install the sewage ejector pump in the sewage basin and connect the PVC plumbing to the main sewer line.
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