Hand against maniac

[Roy6]

Prima 5/10 with 2.5/5 blinds.
My concerns are mainly preflop.

I'm SB and everybody folds to UTG (67/32/4) who is a maniac. He'll bluffraise the river with K-hi or cap all streets with 3rd pair.

Anyways, BB is a loose, bad player, who I saw playing very aggressively against the maniac though (check-raising 3rd pair on turn, etc.)

Anyways, I decide to call $7.5 on the SB with JTo
BB folds

Board is KJQ55 rainbow, and I check-call all the way.