flow loss question

RonD

Premium Member
We have our sump below our diplay tank. We have 2" spaflex running straight up out of our sump to the tanktop, 5 feet above and then it takes a 90 into a T fitting and then reduced into 1" (re the picture).. exiting into the manifold that delivers water to our loc lines. My question is.. I think the 90 and the T are robbing head pressure. I am thinking that perhaps adding a Y pipe inplace of the 90 and loosing the T fitting. So it would run up from our pump to a Y fitting into two 2" 90 degree bends on opposite sides over the tank edge where the 1" 90's are in the picture and reducing there.... would there be much of a gain as we would be loosing two 90 bends ... worth doing the change? I tried the head loss calc but my pump (sequence dart) is not listed there and this sort of doesnt fall into what I think that chart was meant to do.. hope this is clearly explained and you can see what we be speaking about... thanks for your help .. I hope lol

pumptotank.jpg
 
You are definetly losing flow with the tee. Your new idea seems logical to me. The dart, if I remember correctly has a 1.5" outlet? I would use that diameter on all of your plumbing up to the outputs and reducers just before the locline. This should increase the flow velocity.
 
I also agree that by doing the change you will see improvement. Also by having the plumbing reduced you cut back on flow rather than gain. I agree with Allen also.
 
I never thought about ugrading the manifold to the same diameter of pipe as well....hmmm wonder what the gain would be? thanks for the idea :)
 
It took a bit of work to find an actual Y fitting but alas.. a hot tub and pool place had one.. and oh lucky me.. it was in the box of 'special fittings'. A 'T' fitting at home depot $1.89... a 'Y' fitting at the pool place.. priceless.. yikes. I went with the larger pipe all the way thru the manifold.. works alot better... my poor sump has never seen so much water. Recommend to all never to reduce the size of pipe when ever possible. Thanks again to all three of you for your helpfull hints
 
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