Zoeller540-0005 FLEX Series Water-Powered Back-Up Sump Pump

It’s nice because it uses your water system for a backup instead of batteries.

was a replacement for a similar model installed about 12 years ago.

Did not work for me out the box. Properly installed and in my particular setup the lift was not high and I had great water pressure so hint seemed defective.

This backup pump works great! I selected it based on the reputation of regular Zoeller primary sump pumps.I am not a plumber and spent my time installing it and using shark-bite fittings and valves as I didn’t want to get into soldering connections. I contacted Zoeller afterwards and recommended they specify pipe dope instead of Teflon tape for the screw-type connections and provide more detailed instruction on how to connect the float valve hose connections.

First off the one I was sent was definitely used. Two of the O-rings were broke and a silicon/caulk was put in place of where they would go, this messes with the functionality of the unit and dictates how you would install it. In my case I was able to remedy this on my own, but for as much as this costs it shouldn't have even been an issue. Second, there is no built-in backflow/backsiphonage prevention so you will need to purchase a dual check valve with an atmospheric vent since this will be connected directly to your potable water supply.THAT BEING SAID....It works great and offers piece of mind when we are on vacations or not at home when the power goes out or even if the main sump pump gets clogged up a bit.

This product leaked out of the box where the impeller meets up with the Y connection. I had to re-install this product 3x before I figured out that the leak was coming from the part that was pre-assembled. I took that apart and applied a generous amount of Teflon tape and now it is fine...... but very disappointed that this was overlooked, cost me some $$$.

I hired professionals to install it because I'm incredibly un-handy, and I didn't want any problems. It words perfectly. I have an underground concrete plumbing "bunker" that would fill with ground water. Since I had water power but not electricity, this was the solution to keep the water pumped out.

This pump is awesome. It was easy to install, pumps out the water great. The float mechanism works great. I can now be worry free if I were ever to lose power again. I bought this to replace a liberty SJ-10 that failed, and I am very happy with my purchase

I ordered from Canada. I got shipping notice and confirmation about the amount which included a line item for Import Fees totalling $49.58 Cdn. I complained and order was retracted. I found out when I tried to track the owner.Nevertheless, I reordered and this time no import fees were added.As a DIY guy, I drew a picture of how to connect to water and drain as a secondary sump pump. With power outages increasing, having a water powered sump pump is mandatory.Included in photos is the pump spy that comes with two back flow valves. I cut one side of the spy pump so things fit better.Photos show Zoeller sump pump mounted vertically. Water input at bottom and water out at top.

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