Zodiac fc470 intercommunication valve not sealing off chambers
I just picked up an fc470 and I am having trouble figuring out the ic valve settings. I have researched it plenty, however I cannot figure out the problem. My whole boat inflates and deflates through any single valve, no matter how I have the others set. If I have all of the other valves at 6 o'clock (supposed to be sealed off) they will not leak air out of themselves, but will still allow air to pass between all chambers freely. Am I missing something, could all the valves need rebuilding, or could the internal baffles be bad??
Not that it matters for this problem, but one of the valves is frozen in the "fill" position and I plan on lubricating it soon. All of the others rotate fine, and when at the 6 o'clock position, they seal off and don't let air out.