How it connects
Push-fit mechanical friction insertion where external annular ribs/ridges on the slightly tapered male spigot engage against the inner wall of a female sewer & drain hub.
Male and female halves
Male spigot designed to insert into a matching female hub or socket.
Usually connects to
- 4 in. Sewer and Drain (S&D) female hub
- 4 in. SDR 35 PVC hub
- 4 in. ASTM D2729 PVC drain pipe socket
- 4 in. catch basin outlet
Common sizes
- Nominally 4 in. (typically stepped/tapered ~3.6 in. / 92 mm at tip to ~4.2 in. / 106 mm outer diameter).
Where it is used
residential drainagestormwater drainagelandscape drainage
Variations
- Corrugated-to-S&D adapter spigot
- Catch basin outlet spigot
How to recognise it
Recognised by a tapered cylindrical male nozzle with distinctive exterior concentric ribs/steps molded in black HDPE plastic, sized to slip tightly inside standard 4-inch S&D hubs.
Often confused with
| Confused with | How to tell them apart |
|---|---|
| Solvent-weld PVC Sewer and Drain male spigot | PVC solvent spigots have a smooth outer cylindrical wall meant for primer/glue, whereas this HDPE spigot features stepped/tapered push-fit compression ribs for non-glued friction fit. |
| Schedule 40 DWV male spigot | Schedule 40 DWV has a larger outer diameter (4.500 in. vs ~4.215 in. for S&D) and smooth cylindrical walls for solvent cementing. |
Also called
4 in. S&D spigotSewer and drain male adapter spigotHDPE S&D push-fit spigot
Good to know
Commonly found on molded black polyethylene (HDPE) drainage fittings, such as the NDS 451 adapter, allowing connection between corrugated drainage pipe and smooth-wall S&D pipe or fittings.
Related connections
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