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Engineer who did the plans did confirm I can go 6” instead of 3” if using #4.

Forgot to answer your question. It’s not a case of a builder telling be to go another way. I’m doing an OB and I’m now preparing a package to send out for quotes, and I suspect many will come back with cheaper options of Different spacing. I‘ve sent the engineering company a request if they...

I was thinking about getting a test run also. In the map of the state, yes, Houston is in the highly expansive area. im also wondering if I’m reading the tables above correctly. And if the spacing of 3” is only in the area where depths reach beyond 6’. If that’s the case, it’s really only...

Thanks. When I looked up expansive soil maps for Texas, everything around Dallas and Houston show Highly expansive soil. I know it’s a lot of clay. the drawings state PCF of 60. In reading some pool engineering articles, seems like 60 is not really, really high, but above avg. builders...

I should also note that the pool builders I received quotes from all used 8” spacing, and suggested it was generally the standard unless a special case.

In reviewing my plans, the engineering seems to be calling for fairly tight vertical spacing. The plan is for (what I believe) a pretty standard geometric pool, 3.5’ to 6.5’ water depth, with a raised wall on one side. Build is in Texas, so land doesn’t get much more flat. Looking at the...

I’m still finalizing the plans, and getting quotes. I can already say that it’s true, you won’t save as much as you think, because you start spending it on upgrades or in areas to get a better build. From what the pool builders were quoting me, I believe I could probably save +25% if I did...

Thanks. Yes, I was planning one or the other, but noted the 2” line of jets offered the variety of different flow rates. One more random question when preparing the hardware list. For the main drains in the Spa, if I’m targeting 100-120 GPM, should I be looking at the HF drains like these...

@mas985 , in the links above, am I correct the Gunite body would all be the same, and the Jet internals dictate the flow rates?

That image was the 2" model, but they have the same diagram, with more detail for the 2.5". The way I'm reading it, the Flow is dictated by the jet internals/insider, and not the Jet Bodies. So I'd order X# of Jet Bodies as they're all the same, and then select the Internals I want, based on...

so this occurs in the Gunite body assembly in this pic? Where the air line has the slot at the bottom. what makes it confusing is the internal jet says 10 GPM, but there’s nothing referenced for the Gunite body. For example, Looking at the CMP site, the Gunite body lists pipe sizes, and Jets...

And the jet orifice is in the jet body itself, Correct? Everything else in that diagram can be selected irregardless of the Jet body. just seems odd that so many jets online don’t seem to list GPM, or the Orifice size. Just the pipe size.

When building the Jet hardware list, what components dictate the flow requirements? Is it the jet itself, or do tee’s orifices need to be selected? I was looking at the Poly Jet hardware and the jets have GPM listings, but then it also has a list for orifice choices for the non-adjustable...

Thanks Bill. Right now I have one skimmer planned in North corner, and the other directly opposite in south corner.

That’s a great idea, and may have already given me my answer. My daughter had a large inflated play ball for ages in the yard and I recall always moving it when mowing the lawn. It was usually in two or three spots. thanks.

What have you found the predominant wind directions to be? And any suggested skimmer locations based on your experience? according to historical weather sites, it’s from the south, but in general it always seems like fronts come from the west.

Guess I could always slap an intellivalve on the Pad side of the airline, and have it close when spa mode is off and open when on. Although it’s the same price as just adding a blower then.

hmm, maybe I’m not understanding the air line check valve. The check valve is to prevent water from moving backwards through the pipe. When water starts moving backwards, wouldn’t that push air ahead of it, and close the valve?

i assume I can mix these also. for example, 8 - 1/4” with 4 - 3/8”. maybe try keeping everything under 110 GPM, when considering max flow.

are those calculations all based on the same pump speed assumption? does any of those provide more pull from the venturi and thus clean the line faster? i started looking at check valves and then realized I’d need an air check valve, not water. So does the location of the check valve really...

I was thinking the HL at the pad, but just more to angle the pipe down, more than anything. If it didn’t work, cut the pipe, and add the blower. I’ve not finalized anything on jets. That’s the next topic, but have been asking plumber subs what they offer, as they have ‘Base Spa ‘ fee that...

yes I can. Shortest run I can figure would be 25’ from spa to raised wall keeping pipe at water level. I read in one of you’re older posts, max safe dist without check valve or blower was 10’? Or does jet selection, velocity, GPM etc also factor in to how much water it can clear? If I have a...

The descents are in the raised wall on the opposite side of the pool from the Spa. I can run the 2.5” air line under the pool and up into the wall. It would be 15’ across the pool, but it has to go deep and then back up. I figured I wouldnt want that as then the jets have to pull water up 4...

looks like 15’ run to the edge of decking then HL, with an accessible check valve, is where the roads are leading. Or run to pad with blower.

I had one other thought come to mind, but not sure if it’s crazy or wouldn't work. Easier to describe with a visual, so attached a sketch with elevations measured starting at 0" using the bottom of the trough. Assume I put a HL in the back wall of the Spa, where I have the spill over trough...