Frequently Asked Questions
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The John Guest Speedfit 12mm Blanking Plug is designed to seal unused 12mm John Guest Speedfit and Whale push-fit fittings, providing a secure, leak-resistant closure for fresh water plumbing systems in caravans, motorhomes, campervans, boats and horseboxes.
Ideal for temporarily or permanently blanking off spare outlets, the plug simply pushes into any compatible 12mm push-fit fitting without the need for tools, solvent or sealants. It is perfect for isolating future pipe runs, sealing unused manifold ports or capping redundant connections during repairs or system modifications.
Manufactured from durable, corrosion-resistant acetal, this fitting is fully demountable, allowing it to be removed and reused whenever your plumbing system is altered or expanded.
A blanking plug is used to seal an unused 12mm push-fit fitting, preventing water from escaping while allowing the fitting to be reused in the future.
Yes. It is ideal for sealing spare manifold outlets, unused tee fittings, valves and other 12mm push-fit connections during new installations or repairs.
Yes. Like other John Guest Speedfit fittings, it is fully demountable using the appropriate collet release method, allowing it to be removed and reused.
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.