Erasmus354
[H]F Junkie
- Joined
- Mar 12, 2004
- Messages
- 9,450
Y fitting will only add restriction when converting two waterpaths into 1, never when converting 1 waterpath into 2 such as on the outlet of a pump top because the restriction of the components in the loop will always be greater than that of the Y.
Think of it this way you have 1 serial loop total flow through components = 1.5gpm flow through pump = 1.5gpm.
Now you throw a Y on the pump outlet and divide the serial loop in two parallel loops. You now have two loops capable of flowing at least 1.5gpm each 1.5gpm loop a + 1.5 gpm loopb = 3gpm flow through pump and Y.
Read what I wrote again, then bang your head against the wall for not paying attention.
It isn't the Y fitting that is reducing restriction, it is the act of the parallel loops. If you were to have a parallel loop with something like the T3 where there are two outlets on the pump it would have less restriction than if you made that parallel loop with a Y fitting. It is because the Y fitting typically will have a smaller water path than the tubing.
Now you're not talking about much mind you, but there is some, probably equivalent to the restriction of a barbed fitting.