Thank you for your question. If your Delta Windemere Lavatory 25996LF-ECO has been installed for some time, the bonnet nuts may have seized due to mineral deposits or hard water, and no longer be removable easily. If the bonnet is stuck and you cannot unscrew it by hand, wrap it with a cloth and gently use a wrench to give you some extra leverage. Also, take care not to exert too much pressure. The bonnet nuts can be bent by too much pressure and would then need to be replaced. If the bonnet nuts are still stuck, we recommend soaking a rag in a 50/50 or stronger mixture of white vinegar and tap water. Wrap the vinegar soaked rag around the bonnet nut area and let it soak in for approximately 20 minutes in order to remove the calcium build up that may be preventing you from unscrewing the bonnet nuts.
Date published: 2019-02-26