Not sure whether to start this thread or add to this one, but here goes. My DIY Clorox system (suction from Home Depot pail into pump bucket) has been working great for a couple months. I just replaced my single speed motor with a 2-speed running on low. With my needle valve wide open I'm getting no Clorox flow. I think I need to remove my check valve since the suction probably isn't enough to open it, but if I do when the pump is off I believe Clorox will start moving. My HD bucket is below water level, so water will flow back into the bucket diluting it. If I raise the bucket Clorox will flow into the pump (not good).
I could buy a new timer that would let me run on high for an hour then low for 7 hours, but that's an expense and pain to hook up. Are there any DIY fixes for this problem? (low pressure check valves?) Or is it OK to let Clorox seep into the pump?