Home: Toilet
oneway toilet plunger   (+2, -3)  [vote for, against]
pushes water through instead of back and forth

Has flap valve at the top so repetitive plunging action results in a purely positive pressure instead of a fluctuating pressure.
-- davea0511, Oct 17 2007

(?) Compressed air http://www.seenontv...ylo8CFQ6CPAodYQ1ieg
One way plunger that uses air pressure. [Noexit, Oct 17 2007]

DIY-baked http://wayback.arch...ine.com/23/plunger/
[notexactly, Mar 26 2015]

But what the the fluctuating pressure is good? Sort of like rocking a car stuck in a rut.
-- bungston, Oct 17 2007

use a banana.

-- po, Oct 17 2007

Bone! [-] Sometimes you need that negative pressure to back out what ever can't be forced through. When you have massive amounts of tissue and waste matter wedged in the hole like a plug, sucking it back is about the only way it can be released.
-- Jscotty, Oct 17 2007

The most restrictive area in a septic system is at the toilet. It's designed that way on purpose. Push it through and you're done with it.
-- davea0511, Oct 17 2007

Have you even had a toilet fill after it's clogged to the brim? That's when you need a one-way toilet plunger.
-- davea0511, Oct 17 2007

These are done. While not strictly a plunger, they are a method of using compressed air in singular, forward direction.
-- Noexit, Oct 17 2007

Even if its filled to the rim, sucking the obstruction outward will allow the rest of the water to freely flow down the drain.
-- Jscotty, Oct 18 2007

Oh the negativity!
-- pashute, Mar 29 2015

+ after seeing the DIY from notexactly, its simple to have it both ways (pun intended). If you want a regular back and forth plunger just close the valve. Open it, and you get a one way plunger.

Dave, propose it on Quirky!
-- pashute, Mar 29 2015

random, halfbakery