Correct drawings. Lee me know what you think.

[Nit2winit1976]

We are building a new home with inground pool. I have attached the plans as of now. The PB is working on final shop drawings now. We should be breaking ground later this month. All equipment is Hayward, the heater is propane 400,000btu whirlpool heater. Wetedge primera stone Grigio treasure. Jerusalem limestone coping and spa veneer. The plan is to use the overflow from the spa to heat the pool when needed. We live in coastal Virginia so should only need heat early spring. So only one heater on the spa side. Other than that spa and pool will have seperate pumps. You can see in the drawings 3 lights, skimmers etc. always looking for input, trying not to make any mistakes.

 

[HermanTX]

Overall the design is nice. Is the arc a sunshelf?
It appears that there is a spillover from the spa to the pool but there are 2 independent pump, filter & SWCG systems (1 with a heater). Will they support the spa and pool separately? Do you plan to close pool in winter and keep spa open?
Not sure why you need to have 2 separate pump, filter and SWCG systems.

Each of your 3 skimmers should be independently plumbed back to the equipment pad. That is not very clear on the equipment pad drawing.
The SWCG should be rated 2x the pool volume. what is volume of pool?

Can you give specifics on the Hayward equipment? That would help to gain feedback on what you are using. Need filter size, pump rating, etc.

 

[Nit2winit1976]

I guess the reason for two seperate pumps and swgc is so we can turn the waterfall in the spa off and treat the pool and spa differently right? If we isolate the spa it will need its own saltwater gen and pump correct? Atleast this is the way it was explained to me. I have to get all the Hayward model numbers. Yes the sun shelf you can see in the drawings is from 6” to 10”

 

[Nit2winit1976]

So do we need 2 seperate filters with this setup? We will be running the spa and pool independently, but also together sometimes for the waterfall effect. My builder says we need 2 salt gen and independent pumps. What say you? Thanks in advance

 

[HermanTX]

If you have a pool and spa which is connected by a spillover then you only need 1 pump, filter, heater and SWCG. 95% (or more) of the pools are built like this. There are 3 modes
Pool mode - suction from the pool and return to the pool. Both the heater and SWCG can support this. The heater can heat the pool if needed, it just will take time.
Spa Mode - suction from the spa and return to the spa. Both heater and SWCG can support this.
Spillover Mode - suction from the pool and return to the spa. The Spa then overflows into the pool. This chlorinates both bodies of water and can heat both bodies of water (however the heating will take longer). You can run the spillover mode all day or many of us just run it 2 times a day for 30 minutes to refresh the spa. A topic for another discussion, but a spillover creates aeration and aeration can increase pH which can affect the balance of the Water. So it is manageable if you wish to run it more often, just need to be aware of the effect of a lot of aeration.

Furthermore, if you are in the spa for 3 hrs, that is fine. The pool will be fine as well. After the spa, simply turn it back to pool mode.

Maybe the PB is not telling you something or there is something else unique that is not evident in the drawings of the pool.

If the SWCG is placed before 3-way valve that directs flow to the either the spa or the pool then the SWCG will chlorinate either one. In fact, the SWCG comes with a setting for both Pool and Spa modes because you would lower the generation on the spa being a smaller body of water.

You can do this without automation (all manual) but automation system will simplify it by moving the automated valves on both the suction and return sides and adjust the SWCG as needed depending on what mode you are in.

Hope all of this helps you discuss it with the PB and explain why he thinks you need 2 sets of equipment with a connected spa to the pool.

 

[ajw22]

Running two independent pump systems that are not interconnected will not work for the spa to spillover into the pool. The water from the spa will effectively drain into the pool over the spillway and not be replaced.

For a spillway to work you need one pump to suction from the pool and return to the spa. This circulates one body of water between the pool and the spa.

You need to decide if you will have two independent bodies of water with separate equipment and no spillway interconnection OR a spillway interconnected pool and spa with shared equipment.

 

[Nit2winit1976]

Very good information, I have a call into the builder now to discuss. I will report back. Much appreciated