yes its made of rubber. it only appears to be ceramic because years of dry heat inside the boiler cause it to go hard and brittle. you can still buy that specific tube but any air pressure tube will do, just make sure its the same length and diameter. worcester supply their air pressure tubes in 5m lengths so there'll be plenty spare
Cheers dave, being new and not able to get hold of anyone who would know. I didnt want to take the risk of putting anything on that would possibly cause problems.
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