I have a vessel sink which is lacking a drain stopper. The vessel sink does not have a pop out system (buttom to pop out the drain). The internal diameter is probably 1 inch. When i look for drain stopper they look like i have to unscrew the pipe from below and then install it. What do i need to buy that is eayy to install without unscrewing the pipe and works well?
Searching for rubber drain stopper or rubber drain plug gets plenty of results. For example, Amazon - Danco has a range of sizes from 7/8" to 1-3/4". I can't vouch for this specific brand, but I have something similar in my tub. The basic idea is rubber will compress a little and if it is sloped a little instead of a cylinder, it can adjust to fit. Measure the drain and pick a stopper that is, ideally, a little larger than the drain at the top and a little narrower than the drain at the bottom.