When you buy the pvc under-sink & traps, what you are really buying is predictability. At a glance Type: P-Trap Diameter: 40 mm Material: PVC Flexible: Yes Price: à§³12.94 (offer à§³12.26) Why it holds up Set up as a p-trap-class unit, it does the job without asking you to improvise. In practice Daily duty: handles the regular routine without constant babysitting. Storage: stows neatly, taking no more room than a loaf tin when out of service. First use: no break-in ritual required beyond a quick wipe and a glance at the label. Order it, use it for a week, and it becomes furniture rather than a purchase.