Can I buy a replacement black plastic ring for my piston?
FAQ from Radleys
The black plastic ring that is part of the piston handle can be replaced.
For Reactor-Ready, Reactor-Ready Duo and Lara - 15 mm piston:
435-1423: Loosening Ring 14/23 (Pack of 10)
For Reactor-Ready Pilot - 25 mm piston:
435-2429: Loosening Ring 24/29 (Pack of 10)
Please note, this is not a part that customers commonly need to replace. In order to reduce any risk of damage to this part in future, please take note of the following:
1) When the O-rings/piston are in good condition and are sealing properly, this should prevent chemicals leaking down to the black loosening ring. The piston O-rings (and the piston itself) should be regularly checked and replaced as required.
2) You should also be careful not to apply lots of force to the piston to remove it, as this could damage the piston / loosening ring.