What to do if your popup sink waste button is stuck in the down position. See how I diagnosed the problem and then fitted replacement parts. Useful hints and tips for other sink waste problems.

I used these parts:

SP WK PUSHKNOB ROUND SS
133.0391.835
£28.30 incl. VAT & delivery

SEMIINTEGRATED POPUP WASTE KIT 3 1/2", WITH OVERFLOW, CABLE 500MM
112.0301.698
£46.10 incl. VAT & delivery

Available from Franke Central Services UK
https://centralservicesuk.co.uk/