This 12mm John Guest Speedfit water adaptor CM451214FS connects 12mm push-fit pipe to a 1/2" BSP male threaded fitting, ideal for taps, filters and valves in caravan or domestic water systems. The push-fit end simply inserts onto 12mm semi-rigid pipe, while the 1/2" BSP female flat-end thread screws onto compatible fittings to create a secure, leak‑tight joint. Made from tough grey acetal copolymer with a food‑grade EPDM O‑ring, this adaptor is suitable for potable water and intermittent hot water applications up to around 65°C. Push-fit technology allows quick installation and easy disconnection without tools, making it popular for caravan, motorhome, campervan and boat plumbing upgrades.

• 12mm John Guest Speedfit CM451214FS water adaptor – 12mm push-fit x 1/2" BSP female. 10 Pack

• Connects 12mm semi-rigid pipe to 1/2" BSP male taps, filters, valves and fittings.

• Grey acetal copolymer body with food-grade EPDM O-ring for potable water use.

• Quick push-fit installation and tool-free disconnection for fast plumbing changes.

• Widely used in caravan, motorhome, campervan and boat fresh water systems.

Our Delivery Options

Express 2/4 Day Delivery

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• Delivery Time: Before 6pm Monday-Friday

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Next Business Day Delivery

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• Delivery Time: Before 6pm Monday-Friday

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Pre-12 Next Business Day Delivery

• Delivery Fee: £12.99 delivery for all pre-12 orders
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• Delivery Time: Before 12pm Monday-Friday

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Remote Areas Delivery

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• Delivery Time: Standard delivery (2-4 days)

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Weekend Delivery

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• Delivery Time: Before 6pm Saturday

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Good To Know

For orders to some addresses, especially in the Highlands of Scotland and Offshore, next day delivery options are not available and delivery can take several days. Saturday delivery is not available for remote areas.

Items over 30kg: Items over 30kg can only be delivered from Monday to Friday. If ordered before 3pm, please allow up to two business days for delivery. Orders placed after 6pm Thursday will be delivered after the weekend.