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Here is the piping, ex-pad, for review. The bubbler pipe, 2.5 inch is extended to within 12" of the exit for each bubbler where it becomes 1.5 inch pipe. Is the bubbler flow still essentially equal? Return line pipes are 2" and 18" below the pool water line. Do locations of the suction and...

Is the model number the IntelliFlo VS-3050 or is it a family of pumps?

I suppose the goal is not to buy too much pump. Or too little...

I thought to interpret a pump chart one had to assume a TDH.

When the bubblers are on, it seems a three port actuator on the return side is in order to provide the 30 GPM each bubbler requires. I suppose another three port actuator on the suction side to divert suction to the dedicated suction line. Another possibility is an actuator for a bypass around...

I wanted to create a visual way to interpret Mark's study of piping systems detailed earlier in this thread. There is a natural conflict between flow and head loss (friction) and depending on your goal, a perfectly balanced flow, minimum head loss, or somewhere in between, it is mind numbing if...

That makes sense for returns. Suppose we were referring to a static exit like a bubbler?

Thanks for the analysis. I think this kind of study is extremely helpful in understanding plumbing designs. In the series design, or others that are imbalanced, can the difference in flow rates be optimized by changing the size of the branches inversely to the distance they are away from the...

Could you suggest some configurations? I assume a control board, some multi port valves, and actuators are involved. I also have some data I could post on length of each line and fittings as shown in the drawings if that would help.

Well ideally, I would like to run the entire system on one VS pump. I don't know enough about automation and actuators to be able to figure out what to do. For instance, is it possible to set it up so that when the bubblers are on, the other returns close and when the bubblers are off they open...

Here is a preliminary layout for comments There are: 8.700 gallons in the pool Three 2" returns One 2.5" bubbler return Two skimmers One 34" channel drain One 2" dedicated suction line So there are four pipes on each side of the pump. Does that mean that the flow rate is equally divided by...

I'm not sure I understand what you mean by a four-way to feed three bubblers...

Thanks Mark, Clearly the calculation is beyond my pay grade. On the other hand, the more info I have, the more comfortable I am with making decisions. Maybe the best path is to provide some drawings that show the overall design of the plumbing and the experts can just provide their opinion. I...

I thought the Total Losses In Equivalent Feet of Pipe Method accounted for the flow rate. If not, could you explain how to do it? I understand that in this case the loop may not be needed but wanted to understand the method of calculating a loop anyway. Edit: Here is a link for an explanation...

Nope, no access. But I do like the idea of being able to control each bubbler. It's just mo money so we shall see how it goes.

Sorry for the above attempt at the bubbler TDH flow. It may have been the wine :-D Let me try again. The charts I have do not indicate Total Losses In Equivalent Feet of Pipe for various flow rates. They simply carry one value. Perhaps Mark can indicate where such info could be found...

Ah..the low flow bubbler... The ColorCascade bubbler from Pentair is the one I'm planning on using. I'm actually quite surprised I can't find more than one other manufacturer of these things. This one also has LED lights I'm not even sure if I like. My understanding is that the bubbler, in 6"...

Here is my attempt at the plumbing for the three bubblers. Based on my understanding of the hydraulics, the 2 1/2" loop creates a constant pressure on all three 1 1/2" lines to the bubblers. However, if there is a more efficient way to do this please tell me. The length of each bubbler pipe...

So what about the Jandy Multiport valves vs using standard ball valves? At various flow rates, what would you recommend?