Hello together, I drive an older Wowa from Fendt (1994) and always have a strange phenomenon with my faucets. When I get the good piece from the hibernation, or after a longer service life on vacation all faucets work without problems whether warm or cold (kitchen, bath). So after 2 to 3 days I notice this gradually the time between the famous “click” of the taps and the jump-in of the pump takes longer and longer, so that after 4-5 days usually either d the warm or cold water does not work at all. At the beginning I had still thought the cocks would be defective, because Wowa already older, so that the oldest cock is now 2 and the other about 1 year old. But it can’t actually lie there or ?? Only exchange at the cock 🙂 Does anyone have another idea ?? I exclude the pump, because so far a cock has always worked fully.