Latch assembly which suits the Quiptron weir door comes in a pair. If your weir door is falling off and will not pin directly to the inside of your skimmer box, consider replacing a latch or two.
A WaterCo Eyeball 40mm push in PVC to suit 40mm swimming pool pipe. The eyeball is designed to direct water flow around the swimming pool and aid the pool cleaner if it was to get stuck in an area...