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The Whale Adaptor 11mm-12mm Grooved (WU1211B) is a simple yet essential push-fit plumbing adaptor that lets you connect 11 mm and 12 mm diameter pipework — common sizes in caravan, motorhome, campervan and marine fresh water systems.
This grooved stem adaptor is specifically designed to join different pipe diameters while ensuring a secure, water-tight connection, saving you time and effort during installation or repairs.
Easy size transition: Connects 11 mm and 12 mm pipes without any special tools.
Grooved push-fit design: Provides a reliable, secure seal for fresh water systems.
Lightweight plastic construction: Durable and corrosion-resistant for mobile environments.
Versatile plumbing use: Suitable for caravan, motorhome, campervan and marine installations where pipe size changes are needed.
1 × Whale Adaptor 11 mm-12 mm Grooved (Part No. WU1211B)
| Diameter | 11mm / 7/16"|12mm / 1/2" |
| Angle | Straight |
| Brand | Whale |
| Type | Stem Adaptors |
| Colour | White |
| Primary Construction | Plastic |
| Fitting | Adaptor|Push-Fit Fitting |
| Diameter Description | For 12mm and 11mm Pipe |
This adaptor is ideal for transitioning between common water pipe sizes in leisure vehicle plumbing systems.
Caravan & motorhome fresh water systems
Campervan plumbing installations
Marine and boat water lines
Repairs and upgrades where pipe sizes differ
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