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...ylo8CFQ6CPAodYQ1iegOne 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.
sorry.-- 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