Nice. Let's see if I understand correctly:

- you have replaced the solid intake pipe with a solid T junction of the same diameter, feeding to two pumps.

- These two pumps feed (using some larger-diameter hoses) into a two-to-three header, which go to the three sprinkler valves as usual.

- The original hoses from the solenoid-controlled valves to the sacs remain as original.

- Your center sac's unused port now fills the new bow sac, fed from the port side.

- The new bow sac will drain on the starboard side into... will it rejoin the existing plumbing, or just go into the bilge?

Did you do any rework of the sprinklers after the header? I think that there was some talk of changing the valves for larger ones, or removing springs, or some such.

Thanks in advance!