The RH active sump was drained (over Jul 31-Aug 01), in total approximately 5500 L of water was sent to city sewage.

We also tried to divert water from the BL1A holding tank to the active sump, and learned that we cannot run back-flow through the sump pump. The valving configuration used here was V10, V1, SV1, V6 open - V2, V3 closed. (Note solenoid valve SV1 does not serve a purpose and energizing/powering-down does not affect the observed flow.)

In order to divert water from the holding tank to the sump, we likely need to add a 'T' after V6 to send the flow through the opening port into the sump.

The BL1A holding tank was subsequently drained and is now ready again to receive water from T1/T2/TNF.