New Build Plumbing Configuration

KC in AZ

Member
Feb 16, 2021
6
Phoenix
Pool Size
20000
Surface
Plaster
I've been trolling this site December gathering valuable information for my new pool build at my house in Phoenix, Az. I am doing a owner builder pool. In talking with several Plumbing contractors(if you can get them to answer the phone these days) there have been several plumbing configurations discussed for my build. I wouldn't be posting this if I was ok with adding a 3rd pump to handle all the features. If 3 pumps is ultimately the right configuration then I will go with it but I cant seem to find the problem with the configuration in my plan.

I have a ~20k gallon pool with a 1200 gallon raised spa(with spillover), and 3 sheer decents(12LF total), with in-floor cleaning.t
Main pump for filtration and infloors
The Sheers will run on the second pump
I can run the spa therapies off the main pump and through the filter but that limits it to 6 jets, per several recommendations. I'd rather the therapies not run in the filter and I'd like to have 8 jets in my 7'6" diameter spa.

So...
Do I run the therapies on a 3rd pump or can I run them on the same pump as the Sheers. understanding that the sheers cant run when the spa is on....

I have drawn the attached schematic with my plan. Please comment on foreseeable issues/problems and/or reasons for/against a 3rd pump.
 

Attachments

  • 2 pump scenario.jpg
    2 pump scenario.jpg
    64.1 KB · Views: 17
  • plan view.JPG
    plan view.JPG
    28.3 KB · Views: 16

KC in AZ

Member
Feb 16, 2021
6
Phoenix
Pool Size
20000
Surface
Plaster
I also thought that I could put the hot water return line direct to the spa instead of back to the main manifold?. I wouldn't ever be heating the pool in Phoenix....
 

Andrew_D

Well-known member
May 8, 2020
149
Manitoba, Canada
Pool Size
15000
Surface
Vinyl
Chlorine
Liquid Chlorine
SWG Type
Hayward Salt & Swim 3C
You're not going to get many people that want to open a PDF to view. JPG is likely prefered. Here's your pics as JPG.

I can't give much advice on your questions, but hopefully having the pics here will get a few others to chime in.

Andrew
 

Attachments

  • Image3.jpg
    Image3.jpg
    59.5 KB · Views: 13
  • Image4.jpg
    Image4.jpg
    34.3 KB · Views: 13

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
37,285
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Looks really complex. Why venturi skimmers? Why in floor cleaning? Todays robots clean better without running your pump at high flow rates. Your SWCG should be before your spa/pool split. Drains cannot be pulled from two pumps at the same time unless they are specifically designed for that.
 

luckyc1423

Well-known member
Apr 8, 2017
141
houston texas
Questions.

1) why can’t you run the 8 jet on the main pump?

2) what is the difference between pump 1 spa return and pump 2 spa spillover?
3) put ball valves on the sheer waterfalls so you can adjust how much volume each waterfall gets
 

KC in AZ

Member
Feb 16, 2021
6
Phoenix
Pool Size
20000
Surface
Plaster
Questions.

1) why can’t you run the 8 jet on the main pump?

2) what is the difference between pump 1 spa return and pump 2 spa spillover?
3) put ball valves on the sheer waterfalls so you can adjust how much volume each waterfall gets
  1. 6 is the max to run through the filter per several plumbers I've talked to locally. I think based on restricted flow through the filter?
  2. I had 2 return to spa to run all 4 "features" on 1 pump. I wont have enough GPM on one pump so I will eliminate that line and just run both pumps in water feature mode, utilizing the pump 1 spa return. see revised sketch
  3. Ball valves are planned for the sheers, although they will require 144 gpm so not sure how much throttling will be needed....
Looks really complex. Why venturi skimmers? Why in floor cleaning? Todays robots clean better without running your pump at high flow rates. Your SWCG should be before your spa/pool split. Drains cannot be pulled from two pumps at the same time unless they are specifically designed for that.
  1. Infloor- I dont want anything running in the pool that I have to deal with and experience of other pool owners. I will get mostly silt blown in and little large debris.
  2. Venturi skimmers are recommended with infloor as most suction is at main drain.
  3. Drains are AVSC dual suction.
Thank you both for the feedback!
 

Attachments

  • 2 pump B.jpg
    2 pump B.jpg
    60.3 KB · Views: 5
  • 2 pump B.jpg
    2 pump B.jpg
    60.3 KB · Views: 5