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Thread: Cost on inground Tub

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    caliskier's Avatar
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    Cost on inground Tub

    All,

    I have a ~600 gallon gunnite inground tub that came with the house I bought. Until this fall we have not used it other than to keep water running through it and closing it with the attached pool. This season we are considering keeping it open and I have a few questions. Background. We live in Oklahoma City. Temps drop into the low 20s sometimes teens Dec - Jan. and are in the mid 20s to low 30s starting November and ending after February. I have a temp sensor to turn the pump on. I have 2 pumps, one for the filter (without a temp sensor) and one smaller one for the jets (with a temp sensor), so I know when the temp drops below freezing I am going to have to have both running.


    How much does it cost, if I keep a thick spa cover on the pool at all times, to keep it heated and running? I am probably going to keep it at 55 degrees covered until I want to use it Are we talking about $~$50 a month? If we use it a lot I will keep it around 75 degrees covered.
    Owner since August 2014. 21,500G Liner In ground Pool with attached 600G plaster in ground hottub. TF-100 Test Kit, Filter: Pentair TA60D Clearpro Sand (HTH) Filter. Pool: 1 Drain, 2 Skimmers 4 Returns. Hot Tub: 1 drain, 1 skimmer, 2 returns. Hot Tub/Pool run by Sta-Rite Dura Glas Single Speed 1.5hp P2RA5F-182L pump with Emerson K63CXESE4972 motor. Spa jets run by Sta-Rite Dura Glas H/L model number unknown.

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    mas985's Avatar
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    Re: Cost on inground Tub

    A spa is pretty easy to bring up to temperature if your heater is big enough so you shouldn't need to keep it fully heated all the time. You could just keep it at a lower temperature and then heat on demand.

    How often would you really use it?

    How big is your heater?

    Because there are so many variables involved, it would be difficult to calculate how much it would cost you to keep it heated. However, because of freeze protection, you may need to keep the pumps running constantly and that alone would probably cost quite a bit.

    Emerson 1.5hp K63CXESE4972 pump
    That is a motor not a pump. What is the pump make/model?
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    caliskier's Avatar
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    Re: Cost on inground Tub

    Quote Originally Posted by mas985 View Post
    A spa is pretty easy to bring up to temperature if your heater is big enough so you shouldn't need to keep it fully heated all the time. You could just keep it at a lower temperature and then heat on demand.

    How often would you really use it?

    How big is your heater?

    Because there are so many variables involved, it would be difficult to calculate how much it would cost you to keep it heated. However, because of freeze protection, you may need to keep the pumps running constantly and that alone would probably cost quite a bit.

    That is a motor not a pump. What is the pump make/model?
    We will probably use it 2x a week. Heater is a Jandy lite 2, http://www.jandy.com/~/media/zodiac/...h/h0248900.pdf its a pool heater.
    You are right on the pump, thanks for that actually forced me to look harder. Its a Sta Rite Dura-Glas single speed 1.5 HP pump. P2RA5F-182L. The little pump has a label but it only says dura-glas HL, the label with the model is worn off. will update my signiture. thx
    Owner since August 2014. 21,500G Liner In ground Pool with attached 600G plaster in ground hottub. TF-100 Test Kit, Filter: Pentair TA60D Clearpro Sand (HTH) Filter. Pool: 1 Drain, 2 Skimmers 4 Returns. Hot Tub: 1 drain, 1 skimmer, 2 returns. Hot Tub/Pool run by Sta-Rite Dura Glas Single Speed 1.5hp P2RA5F-182L pump with Emerson K63CXESE4972 motor. Spa jets run by Sta-Rite Dura Glas H/L model number unknown.

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    mas985's Avatar
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    Re: Cost on inground Tub

    With only 2x per week, I would probably just heat on demand, especially if those two days are on the weekend. Unfortunately, a 125k BTU heater will take some time to heat up (20 deg/hr) so you may need to plan ahead.

    Does it ever get cold enough for the pool or spa to form ice?
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    caliskier's Avatar
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    Re: Cost on inground Tub

    no, not ice over, but gets in the teens.
    Owner since August 2014. 21,500G Liner In ground Pool with attached 600G plaster in ground hottub. TF-100 Test Kit, Filter: Pentair TA60D Clearpro Sand (HTH) Filter. Pool: 1 Drain, 2 Skimmers 4 Returns. Hot Tub: 1 drain, 1 skimmer, 2 returns. Hot Tub/Pool run by Sta-Rite Dura Glas Single Speed 1.5hp P2RA5F-182L pump with Emerson K63CXESE4972 motor. Spa jets run by Sta-Rite Dura Glas H/L model number unknown.

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    Isaac-1's Avatar
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    Re: Cost on inground Tub

    In Oklahoma city I suspect it will get cold enough that you need to do some active freeze protection at least a few days per year most years.
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from http://tftestkits.net
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