There was a real buzz around the club in the aftermath of the FFA Cup draw, which will see Bayswater play Melbourne Victory at home.
It was a midfield battle in the first 30 minutes and there were not many clear-cut chances for either set of forwards, but Perth were well organised, closing down any half chances that Bayswater looked to create.
The breakthrough came on 35 minutes, when Mark Doninger was fouled in the box by Chris Saldaris.
The player who won the penalty then stepped up and slotted the ball straight down the middle into the back of the net.
The home team then went down to the other end of the pitch, where Todd Howarth played the ball into the path of Steve Burton.
The striker appeared to be crowded out by two defenders, but he managed to wiggle free and unleash a shot that hit the back of the net from about 16 yards.
They suffered a blow at the start of the second half, as David Heagney was forced off with a bad ankle knock.
The game reached a key moment in the 56th minute when Saldaris was given a red card for a rugged challenge on Clark Keltie.
Soon after, Perth had three great chances from close range to score, with Doninger at the heart of it again.