Description
Overview
The Medium Black Drain Plug (bung only) is the genuine Tenob part RWB 1746 for marine drainage points where the socket is already fitted. It uses UV-resistant nylon with a neoprene O-ring to keep water out, even under vibration. For full technical details and dimensions, see the manufacturer’s product page: RWB Marine – Bung Only Medium Black (RWB1746). The medium format increases flow while remaining compact for small craft. Because the plug is a service item, it replaces a worn bung without changing hardware.
Features
- Medium size design with higher flow than standard small bungs
- UV-stabilised nylon body resists sun and salt exposure
- Neoprene O-ring provides a positive, reusable seal
- Bung only, ideal as a direct replacement when the socket is retained
Specifications and Materials
| Part Number | RWB 1746 |
|---|---|
| Internal flow size | 25 mm |
| Cut-out hole | 30 mm |
| Fixing | 2 × 4 mm countersunk holes |
| Body material | UV-resistant nylon |
| Seal | Neoprene O-ring |
These dimensions align with the Tenob medium standard and offer about fifty percent more drain capacity than 17 mm small plugs.
Compatibility and Fitment
The Medium Black Drain Plug suits existing Tenob-style medium sockets or equivalent 30 mm cut-outs. Because it is bung only, install it where a compatible drain socket is already present. Always confirm the cut-out and fixing hole pattern before ordering to ensure a direct fit.
Compliance and Safety
Nylon and neoprene are widely used for small craft fittings. Inspect the O-ring regularly, clean sand or debris from the seat, and replace the bung if the seal shows wear. Do not overtighten the fasteners in plastic substrates.
Marine Applications
– Bilge and cockpit drain closures on tinnies and runabouts
– General hull and deck drains on small to medium trailer boats
– Spare bung carried on board for quick swaps during maintenance
Why Choose Argomarine
We stock verified Tenob service parts so your Medium Black Drain Plug arrives ready for use. Our listings follow clear Australian specs, and we pack small items securely for fast dispatch.
Browse more bungs and drain accessories in our Boat & Trailer Accessories
