The phrase "drain itself" is correct and usable in written English.
You can use this phrase to describe a situation in which something is gradually reduced or used up, for example, "The lake's water levels will eventually drain itself over the coming months."
And you want to have it available to basically drain itself a little between 2 and 6 o'clock in the afternoon.
The owner might have drained it, or let it drain itself, evaporate from precious clarity to airless pond before this measured void, the diving board a dull, more deadly blade.
Five miles or so later, evening was descending and the pale sky looked about ready to drain itself.
At least 90percentt of cases are so-called open-angle glaucoma -- the sink drain itself is open but the pipes are clogged.
The fact that a wound drain was associated with an increased risk for SSI does not implicate the drain itself.
Nevertheless, Austria recruits health workers from eastern member states of the EU [ 25, 26, 47] and might soon struggle with brain drain itself [ 48].
Berlin's status as a cultural capital was fashioned on empty lots and inside abandoned buildings across the capital, vacated as the city drained itself westwards in the 1990s.
The paired wind system constantly drains itself of plasma in the MHD limit.
"Twenty-four hours before competition you just stop drinking completely and your body just keeps weeing, draining itself of all the liquid because you've unsettled your sodium levels.
Within minutes, the crowd has drained itself by half.
I found that the battery drained itself in a few days when the speaker was off, a problem that they company said affected some units.
