Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 7 of 7

Thread: Pump for solar heater - anything special needed?

  1. Back To Top    #1

    Pump for solar heater - anything special needed?

    Hi all,

    The pump for the 2nd-floor solar has died, not a big deal in itself. But. The bloke from the pool shop reckons I need a pump specifically built with solar in mind, something about heat-resistant parts. The old one is a Davey Power Ace 150 (not 150CR), and is probably 15 years old and has been running just the solar (it has its own inlets).

    Is there any truth in that? Apart from it not seeming very likely that very hot water is going to be sucked back down from the roof, will any standard pool pump handle it?

    Thanks.

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,083

    Re: Pump for solar heater - anything special needed?

    Welcome to the forum. MOst solar setups simply use the pool pump to circulate through a solar system. Why does yours require a second pump?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3
    UnderWaterVanya's Avatar
    Join Date
    Jun 2012
    Location
    Mint Hill, NC
    Posts
    2,589

    Re: Pump for solar heater - anything special needed?

    Quote Originally Posted by autocrat
    The pump for the 2nd-floor solar has died, not a big deal in itself. But. The bloke from the pool shop reckons I need a pump specifically built with solar in mind, something about heat-resistant parts. The old one is a Davey Power Ace 150 (not 150CR), and is probably 15 years old and has been running just the solar (it has its own inlets).

    Is there any truth in that? Apart from it not seeming very likely that very hot water is going to be sucked back down from the roof, will any standard pool pump handle it?
    I don't think that pool guy knows what he is talking about.

    As mentioned by the previous poster the majority of solar installations that I have read about here are setup with the main pool pump as the source for the flow.
    Inlaws Pool Boy since June 14th 2012, Pool built ~ 2003, In-Ground, 16'x32'
    13500 gal, Vinyl Liner, Fiberglass Slide, TF-100 Test Kit, Hayward 210T
    sand filter, A.O. Smith 1.5HP main pump motor (C48L2N134C1),
    Hayward SuperPump (model ?), Polaris 380 & PB4 Booster Pump

  4. Back To Top    #4
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,486

    Re: Pump for solar heater - anything special needed?

    If plumbed correctly, hot water should not go through the pump anyway. A check valve should be placed between the filter and the solar valve so when the water drains, the check valve prevents it from going through the filter and pump. Otherwise, the debris in the filter would be back flushed into the pump.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  5. Back To Top    #5

    Re: Pump for solar heater - anything special needed?

    Thanks for the replies.

    The second pump/inlet is just the way it was set up when we bought the place - it doesn't go anywhere near the filter. The pump is a good distance from the pool and also from the house, and the solar setup on the roof is up pretty high, so I assume they thought it'd be a better idea to have a second pump. Whatever, that's the way it is.

    I'll make sure there's a check valve.

  6. Back To Top    #6
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Pump for solar heater - anything special needed?

    If all you have is a suction line to the pump, up to the solar and then back down to the pool return ... there is no point in having a check valve anywhere.

    This is likely a low head-loss system (depending if the solar is in parallel (as it should be) or series. So I would not think you would need a very large pump for this setup.

    Where are you located? The pumps available to you may not be the same in all parts of the world.

    Hopefully Mark can suggest what size pump you need ... although with no pressure gauge in the system, might be a bit tricky.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  7. Back To Top    #7

    Re: Pump for solar heater - anything special needed?

    Quote Originally Posted by jblizzle
    If all you have is a suction line to the pump, up to the solar and then back down to the pool return ... there is no point in having a check valve anywhere.

    This is likely a low head-loss system (depending if the solar is in parallel (as it should be) or series. So I would not think you would need a very large pump for this setup.

    Where are you located? The pumps available to you may not be the same in all parts of the world.

    Hopefully Mark can suggest what size pump you need ... although with no pressure gauge in the system, might be a bit tricky.
    The old pump was 1HP. Given how long it was running, and how there are no issues with any of the plumbing or the panels, I'd say it is about right. I'm in Australia - it gets hot up on the roof, up to 70C according to the sensor, so I just wanted to make sure that we didn't need a special antikryptonite works-in-space model.

    Thanks for help.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •