thanks for your reply.
to answer the questions:
1. Yes both were actually pumping water separately
2. Each pump has its own check valve and weep hole. the two outlets come together before joining the main sewer line (septic). It's been quite warm - no chance of freezing
I know that the first...
About a year ago I had a battery back-up ejector pump added the existing ejector in my basement sump pit. The system has been working perfectly for the last year. Then, for no apparent reason, I have had two instances in the same week where both pumps failed to run resulting in some minor...