What you need-
x1 Anti vac bottle trap with 40mm fittings
x3 pvc pipe screw ends 38mm
x1 Pvc pipe straight coupling 40mm
x1 Barbecue igniter or igniter from a click lighter.
x1 5 inch long plastic or copper tube 20mm
x1 Hose fitting (Remove the valve)
Drill, All surface adhesive, PVC pipe cement
Have fun and play safe!