A
Al
We have had a backflow problem too (many posts on this topic) and decided to replace the pump assembly all at one time so we could rebuild the other one and have a spare. So far, no return of the backflow. I am waiting to see if the backflow comes back in a few days like you mention with other problems (vent, etc.) So, now I have on hand the old pump assembly and a spare repair kit. I want to clean the old assembly before installing the parts. Can you recommend a cleaning product? I thought of soaking it in a bucket first to clean it because I would rather not wear rubber gloves while repairing the assembly.