Pipe flow questions

[mikeintosh]

I have a little giant pump that I want to pump water up about 7ft to feed some small tanks above the display. Instead of 90deg pvc elbows I am using abs long sweep elbows to allow better flow. The smallest size the abs elbows I could find were 1 1/2". The pump outputs are 1".

Does anyone think pumping up with 1" then increasing the pipe diameter at the elbow to 1 1/2" will cause any issues with the flow? Just wondering before I start glueing.

Thanks

[Bergovoy]

you should step up the pipe size right at the pump outlet / discharge port.

If your pipe branches to multiple points, you should step down in size at each branch.''

i.e. 1" pump outlet immediately to 1-1/2" Then at the first branch, step down to 1-1/4", then as yo get to your nozzle, keep stepping down until you get to no less then 1" total volume, for all ports or nozzles.

Basically, 2 -3/4" nozzles is about the same as a 1" nozzle / opening.

Just think like branches on a tree and how they get smaller towards the leaves...

Good luck, and pics please.

Thanks

Bill

[mikeintosh]

Thanks. What happens if you go backwards anyways?

[Bergovoy]

not sure I understand your question, but if you are asking if you restrict the flow because of restricting the size, then I think I just answered your question.

Most mfgs reccomend the size increase directly after the fitting . You may want to look up in your paperwork that came wityh your pump to see if it confirms this information.

[mikeintosh]

Sorry, maybe I asked wrong...

What actually happens if the original scenario is plumbed — 1" upsizes to 1 1/2"?

[rustybucket145]

Your head pressure would be increased.

[mikeintosh]

Thanks. Now that I know, it seems so obvious.

[Bergovoy]

And in this case, more head is not a good thing.