Merchant counters win when staff can recognise pipe stamps, match inserts, and explain torque basics without improvising. This checklist focuses on fast movers and failure modes we see on Gauteng and national routes — tune SKUs to your catchment.
HDPE drainage — shelf basics
Stock bends and couplers for the OD ladder you see most often from local civils and groundworks crews. Keep inspection pieces and snags that match those same OD families rather than orphaning rare sizes.
Accessory discipline: keep compatible gaskets, clips, and lubricants where your chosen systems require them — incomplete bags cause site delays and returns.
Link procurement to our HDPE drainage hub and the downloads notes on list revisions so buyers know which PDF revision they are mirroring.
Compression — shelf basics
Compression wins when you stock complete insert families for the ODs on your shelf edge, not only couplers. Keep transition fittings (male/female iron, BSP variants) that match local building services habits in your catchment.
Counter process: photograph muddy samples, measure OD with a proper caliper, and read the pipe stamp before you sell. If uncertain, call our merchant desk path — guessing creates dry leaks and reputational damage.
Deep link: Compression fittings.
What not to stock “just in case”
Exotic low-rotation SKUs that never move tie up cash and expire. Instead, keep a fast escalation path to branch stock for oddballs — document that path at the counter.
Tie-ins to high pressure
When contractors blur drainage with service connections, have a single printed matrix that says which compression SKUs are drainage-only versus rated pressure contexts — never rely on junior staff memory. For HP contexts, escalate to HDPE high pressure & electrofusion.
Standards and liability
Use Standards & specifications as training text: merchants explain datasheets, they do not reinterpret SANS for customers. When a buyer demands a substitution letter you cannot support, escalate to the project engineer pathway.
Call to action
Plan a 30-minute counter refresher with our team — contact and reference this checklist so we bring the right sample boards. For jointing context on HP lines, see electrofusion vs butt fusion.