I am planning to replace my backyard deck with a concrete and stone patio with an in-ground 8’x9’ gunite kidney shaped spa. I am working with a landscaper who has done a lot of excellent stonework and hardscaping for me in the past—he’ll be doing all the work except for the spa, which he plans to sub out to a PB (with no additional overhead or passthrough fee to me).
The spa specs from the PB are:
• 250 kbtu gas heater hayward h250fd
• 2 speed 1.5hp sp32152ee tri-star pump
• 1.5" s270t sand filter
• 6-anzen #7 jets
• goldline p-4 controler and salt system
• all 2" plumbing and drains
• one LED light
and he’s quoted a price of about $15,700.
First, does this equipment seem appropriate for this system? (The pump will be located 20’-30’ from the spa and around one corner.) Does the price seem reasonable? (Remember that the landscaper will be doing all the hardscaping and stonework out of his separate budget)
Second, I’ve been having trouble getting schematics for spa-only systems and have been wondering how these systems really should be plumbed. Clearly, there needs to be a high-flow ‘therapy’ mode for when the spa is being used, and a low flow filtration/SWCG mode that I presume needs to run maybe 4-8hrs/day. Is a two speed pump the best way to do this, or might two appropriately sized pumps be better? Is it standard to run the high-volume flow through the filter? Obviously that’s a good idea from a filtration standpoint, but not so good from a dynamic head standpoint. When in ‘filtration’ mode, does the pump draw from the same places and discharge into the same jets, or should there be a skimmer that comes into play?
Finally, I’m looking at both the filtration quality and head loss associated with the sand filter and thinking that the cartridge filter really looks better for my application. I know people usually reply with the ‘personal preference’ line on this, and I’d appreciate any comments that would help me make that decision.
Thanks for your help,