Frequently Asked Questions
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Designed for creating a push-fit connection to 12 mm O/D semi-rigid water pipe. This 12 mm x 1/2" BSPP Male/Male Push-Fit Adapter from John Guest quickly converts a Speedfit-style push-fit joint into a BSPP threaded connection.
Made from durable black acetal, this genuine John Guest stem adaptor provides a fast, reliable installation with no tools, heat, or sealing compounds required. The innovative collet locking system securely grips the fitting without deformation or flow restriction, ensuring a tight, leak-free seal.
Corrosion-resistant and fully demountable, the fitting supports both hot and cold pipework and helps reduce maintenance downtime.
This adaptor connects 12mm John Guest Speedfit pipe to a 1/2" BSPP male threaded connection, making it ideal for fresh water plumbing in caravans, motorhomes, campervans, boats and other low-pressure water systems.
Yes. It is designed for use with 12mm John Guest Speedfit pipe and is also compatible with other 12mm push-fit pipe systems that use the same dimensions.
BSPP (British Standard Pipe Parallel) is a parallel thread commonly used on water pumps, taps, filters and other plumbing components. Always ensure the thread type matches your existing fitting before ordering.
No. The 12mm pipe simply pushes into the Speedfit connection. The threaded end should be installed using a suitable sealing washer or gasket where required by the 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.