I'm planning a pool (28K) with a waterfall and "drop in" spillover spa (450 gallons).
Need configuration as simple as possible. I would like to avoid automation if at all possible.
There are seating areas in the pool where water comes out. The primary function (from my wife's point of view) of these outlets is to provide a supply of hot water so she can warm her back while in the pool. These outlets are not for massage.
The spillover spa is another "conversation space" and will provide heat and massage to the occupants.
For parties, the wife wants to be able to have heat coming out of the outlets (eyeball) at the pool seating areas and the spa simultaneously.
The waterfall is on it's own pump so it does not impact any of this design.
I'm thinking the outlets at the seating areas can be tied in with (or replace) the pool returns. The outlets are across from the skimmers and would push water toward the skimmers.
The spillover spa will be plumbed for two pumps. One of the loops in the spillover will be plumbed into the pool's plumping. It will be like having an additional return and drain. They just happen to be in the spillover spa. These pipes will be plumped with the smallest diameter piping that allows for adequate filtration of the spa (450 gallons). The only purpose of this loop is filtration (turnover) of the water in the spa. Instead of smaller piping, valves could be used to control the flow of water to/from the spillover. This, however, would require dedicated lines from the equipment pad to/from the spa.
The second spillover spa loop will be tied to a dedicated pump and heater.
The pool will have its own pump, filter, and SWG.
I'm attracted to this setup because there is no "pool mode" or "spa mode".
The options with this configuration are:
Pool Filter - on/off
Pool Heater - on/off
Spa Pump - on/off
Spa Heater - on/off
The spillover will only be used when the pool is open (we live in southern PA).
We will have a portable spa away from the pool area that we will use in the months when the pool/spillover are closed.
Spa/Pool interaction combination will be:
1. Pool filter on / spa pump on (no heat on either) (dog days of summer)
2. Pool filter on / spa pump and heater on (I'm thinking the small amount of cool water from the pool will be "overwhelmed" by the large amount of heated water coming from the spa heater).
3. Pool filter and heater on / spa pump on (a very rare occurrence... spa gets a little heat)
4. Pool filter and heater on / spa pump and heater on (party time!!!)
5. Pool filter off / spa pump and heater on (While the pool is not isolated there would be no flow to/from the pool....unless there is siphoning or something going on).
When using the heater in the spa but not the pool.....
If the impact of the non-heated water from the pool filtering is minimal then I would think scenario 2 would be the most common.
If the impact is not minimal then scenario 5 is the backup.
I could add a filter and have two separate systems. I like the idea of one system because there is only one system to maintain, but if there are compelling reasons to make this two separate systems....I'm open to that configuration.