Frequently Asked Questions
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The John Guest Speedfit 12mm Female to 1/2" BSPT Male Adaptor is designed to connect 12mm John Guest Speedfit or Whale semi-rigid pipe to a 1/2" BSPT (British Standard Pipe Taper) female threaded fitting. It is ideal for fresh water plumbing systems in caravans, motorhomes, campervans, boats and horseboxes.
Installation is quick and straightforward. Simply push the 12mm semi-rigid pipe fully into the Speedfit connection and screw the 1/2" BSPT male thread into the compatible female fitting. The push-fit connection creates a secure, leak-resistant seal without the need for tools, solvent or sealants.
Manufactured from durable, corrosion-resistant acetal, this genuine John Guest fitting incorporates stainless steel grip teeth and an internal O-ring to provide a reliable connection. It is fully demountable, allowing pipework to be disconnected quickly for servicing or maintenance.
This adaptor connects 12mm John Guest Speedfit or Whale semi-rigid pipe to a 1/2" BSPT female threaded fitting, making it ideal for pumps, accumulators and other fresh water plumbing components.
BSPT (British Standard Pipe Taper) has a tapered thread that seals as it tightens, whereas BSPP (British Standard Pipe Parallel) has a parallel thread and typically seals using a washer or O-ring. Always ensure you choose the correct thread type for your application.
Can't find the answer you're looking for?
Give our technical team a call on 01271 611015 (Option 2) and we'll be happy to help.
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