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(5x) 12mm John Guest Speedfit Water Adaptor CM451214FS – 12mm Push-Fit x 1/2" BSP Female Grey Tap Connector
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£7.99 ex. VAT £6.66
Overview ✕

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.

Delivery Details ✕

 

Our Delivery Options

Express 1/3 Day Delivery

  • Delivery Fee:
    • £3.79 delivery for orders under £30
    • Free delivery for orders over £30
  • Order By:
    • 2:30pm 
  • Delivery Time: Before 6pm Monday-Friday

Next Business Day Delivery

  • Delivery Fee:
    • £7.50
  • Order By:
    • 2:30pm 
  • Delivery Time: Before 6pm Monday-Friday

Pre-12 Next Business Day Delivery

  • Delivery Fee: £16.99 delivery for all pre-12 orders (Weekend Only)
  • Order By:
    • 2:30pm 
  • Delivery Time: Before 12pm Monday-Friday

Remote Areas Delivery

  • Delivery Fee:
    • £3.99 
  • Order By:
    • 2:30pm 
  • Delivery Time: Standard delivery (2-4 days)

Weekend Delivery

  • Delivery Fee:
    • £19.99
  • Order By:
    • 2:30pm Friday
  • Delivery Time: Before 6pm Saturday

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.

 

 

 

 

(5x) 12mm John Guest Speedfit Water Adaptor CM451214FS – 12mm Push-Fit x 1/2" BSP Female Grey Tap Connector

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Total price:

BRAND: John Guest

(5x) 12mm John Guest Speedfit Water Adaptor CM451214FS – 12mm Push-Fit x 1/2" BSP Female Grey Tap Connector

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£7.99 inc VAT
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£6.66 ex VAT
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Frequently bought together

(5x) 12mm John Guest Speedfit Water Adaptor CM451214FS – 12mm Push-Fit x 1/2" BSP Female Grey Tap Connector

£7.99

+
5L C-Tec BW1 Ultimate Bathroom Tanking Solution Waterproof Membrane (535105)

£159.99 £169.99

+
James Parker - Slide Rail Thermostatic Bath Shower & Round Bar Multi Function Shower Kit

£299.00

Total price:

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.

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Free express delivery on all orders over £30. Choose your speed at checkout.

Express Delivery

1–3 working days

Orders under £30
£3.79
Orders over £30
FREE

Next Day Delivery

Order by 2pm Mon–Fri

All orders
£7.50
FREE for Gold members

Pre 12 Delivery

Next working day, by midday

All orders
£16.99

Pre 10.30 Delivery

Next working day, by 10:30am

All orders
£19.99

Weekend Delivery

Saturday & Sunday

Orders under £30
£13.99
Orders over £30
£7.50

Remote Areas Delivery

Highlands, islands & remote postcodes

Orders under £30
£5.49
Orders over £30
£3.00

Orders before 2pm Mon–Fri dispatch same day. Remote-area surcharges apply to Highlands, islands & selected postcodes. All prices include VAT.

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