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Thread: Solar heater pump return

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    Join Date
    May 2014
    Location
    Washington State
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    Solar heater pump return

    Hello TFP folks! I set up a new AG pool yesterday, and assembled a solar heater I purchased off of a random craigslister. My pool has two inlets and one return. I only used one inlet and one return for my sand filter, and hooked an over wall skimmer to the other inlet, and plumbed that to the solar heater. Two questions. The pump I have running the water to the solar heater on the roof is a .82hp c.m.t brand pump. Is this overkill? That pump is a higher hp rating than the one in my sand filter. Second question is whether I can plumb the return line from my solar heater to the same pool return that the sand filter is using. Since the pump I'm using for the solar heater flows so much water, I'm curious whether it might overpower the sand filter's pump and reduce its flow. The return from my solar heater is currently just hanging over the wall and there is a significant flow rate. Anyone who has played around with this stuff and has advice to offer would be greatly appreciated.
    6700 Gallon AG Vinyl Intex Ultra Frame - 1000GPH Bestway single speed sand filter/pump - 5-29-2015
    hth drops - 2'x20' solar heater on roof with .82hp pump - well water

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    mas985's Avatar
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    May 2007
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    Pleasanton, CA
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    Re: Solar heater pump return

    You should always plumb a solar panel post filter so no debris gets stuck the solar panel tubes.

    Next, if the panels are on the ground, you should not need an extra pump. But if you need the extra lift of a bigger pump for a roof mounted solar, then you can plumb the second pump between the filter and the panels.

    Also, it is nearly impossible to tell if a pump is oversized vs undersized from just the HP rating. There are 1/2 HP pumps that deliver more flow rate than some 2 HP pumps so in order for me to comment on that, I need the exact make and model number of 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

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    May 2014
    Location
    Washington State
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    Re: Solar heater pump return

    Thanks, I'll try to figure out a way to run through the filter. The specs on the pump running the solar panel are 3450 rpm, hmax 10m, qmax 250l/min, kW .60, hp.82, pump is a c.m.t brand model 10148.
    6700 Gallon AG Vinyl Intex Ultra Frame - 1000GPH Bestway single speed sand filter/pump - 5-29-2015
    hth drops - 2'x20' solar heater on roof with .82hp pump - well water

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    mas985's Avatar
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    May 2007
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    Pleasanton, CA
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    Re: Solar heater pump return

    That pump could be an issue for your filter because it is about 4x more flow rate than the filter pump so unless you get another filter, I probably would not use it. But you didn't say if the panels were on the ground or not.
    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

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    Washington State
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    Re: Solar heater pump return

    Sorry, the solar panel is on the roof, approximately 11 ft off the ground. I do have an extra paper filter that I could put in line to keep the systems separate.
    6700 Gallon AG Vinyl Intex Ultra Frame - 1000GPH Bestway single speed sand filter/pump - 5-29-2015
    hth drops - 2'x20' solar heater on roof with .82hp pump - well water

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    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,482

    Re: Solar heater pump return

    Your current pump probably would not work well with that height. If you use the larger pump, you would just need to make sure the cartridge filter would handle the flow rate (~50 GPM).
    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

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