Quote:
Originally posted by MadDogMe
I'd also be interseted in what happens to the weaker vent when you introduce pressure/restriction to the outlet, whether it stays balanced or starts to do what you just mentioned. How would you test for it though, fit some blocks and rads inline and see what comes out the end?, if it's still got good pressure all's OK...
If it buggers up there's always the ratchet method, did you try it?, did it work and flip the right way?, or did it keep stalling the wrong way?...
PS, a valve/flap at the Y would work as well, when alls well it would be 'central, if the weak flow gets to low the strong one will force the valve shut. you'd have to make the Y & valve yourself but I'm sure it's 'doable'  . worth it too if that's what it takes...
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If we assume the combined water flow to be 100% the weak outlet is about 30% and the strong one 70% (roughly judging by eye in free flowing operation) block the weak one and the strong one goes to 95%, block the strong one and the weak one goes to about 55%.
[edit] only under special conditions will the "weak" outlet begin to become an intake, the spinning water in the pump still wants to escape, and if the que at the "strong" intake is too long it will do the almost 120 degree turn (loose energy) and leave via the weak outlet.[/edit]
I'm not sure how I'm going to test the flow in-line, mabie use the T peice thing after the pump to check pressure? may work...
[doh another edit] yea I'll look at the flap valve if the in-line testing turns sour, I'll be using a particularly restrictive in-line set up (like my current high pressure direct die block) so if there's an issue I'll find it.