Re-read what you wrote.
"Water in salvation history..."?
Yes, throughout salvation history, the use of water is a common theme.
Yes, saved
through as in
brought safely through.
Not saved as in by way of. This word is often translated
escaped as in the passage below.
Acts 28:4 When the islanders saw the snake hanging from his hand, they said to each other, “This man must be a murderer; for though he escaped from the sea, the goddess Justice has not allowed him to live.”
"...to those who were disobedient long ago when God waited patiently in the days of Noah while the ark was being built. In it only a few people, eight in all, were saved
through (διά) water..." (1 Peter 3:20, NIV, which you quoted)
διά =
through / by / by means of
Source
But surely you don't believe Noah was saved by the flood? You certainly believe he was saved by God through the Ark from the flood.
Noah was physically saved by
passing through the waters of the deluge. Here again are the words of St. Peter...
"...to those who were disobedient long ago when God waited patiently in the days of Noah while the ark was being built. In it only a few people, eight in all, were saved
through water and this water symbolizes baptism that now saves you also—not the removal of dirt from the body but the pledge of a clear conscience toward God. It saves you by the resurrection of Jesus Christ..." (1 Peter 3:20-21, NIV, which you quoted)
Notice, the Apostle does not say, "...
were saved through the ark", but rather they were saved "through water."
And surely believe the Ark to be a symbol of Christ?
I believe the Ark symbolizes the Church of Christ.
Um, no. You've been told this, taught this, indoctrinated into this, but no, that's not what Scripture says.
Again, your argument would make baptism the first example in all of Scripture where the type / foreshadowing of something surpassed the reality of it.
Was the deluge actual water or just symbolic water?
Indeed. And we do, as a symbol of regeneration (the true baptism).
Believing baptism is just a symbol is something you've been told, taught and indoctrinated into, but not what the Scripture says.
In Christianity, matter...matters.
You are extremely confused. Peter himself told you "Not the removal of dirt from the flesh" but you refuse to believe him. You trust other authorities to interpret the interpreter who interpreted this for you directly.
"not the removal of dirt from the body but the pledge of a clear conscience toward God."
I'll just keep reminding you of this in hopes you'll stop trusting in outward symbols.
Exactly! Water is the primary means by which we cleanse ourselves. However, as St. Peter says, in the case of baptism, water is not used to cleanse our bodies, but our souls unto salvation.
"...
baptism that now saves you..."