I find myself with two working shurflo pumps. both the same. I am wondering if anyone has twinned a pair of these.?
By twin i mean split the intake hose with a Y to the pumps and another Y from the pumps back to main supply. I am wondering if flow would be increased...yet somehow I dont think it will..?? Seems to me that although the pressure might increase..flow should remain the same due to pipe size..? Aw hell, I could be talking outa my back end here.!
As for electrical connections, I would simply add the black to its brother and the red to it's brother.
any one want to chime in on this..??
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What are you hoping to gain? Better flow, pressure? My thoughts are that you'd also have to put one way valves on both pumps on the pressure side, otherwise they would fight each other to some extent. I can't imagine that both pumps would have their pressure settings exactly the same. Therefore one pump would max out before the other one. Also, you would double the power requirement, which may or may not be an issue for you.
IMHO if you are looking for increased flow or pressure, you'd be better off by getting a better pump and adding a small pressure tank.
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I don't think you'll see any benefit beyond a small increase in flow. Centrifugal pumps running in parallel seldom led to reliability when I worked in petrochemicals. Check valves will be needed, leak points doubled, power consumption doubled, either pump fails and you have a problem that needs attention. I'd pack your extra pump along as a ready spare if it were me.
For the standard Shurflo, you will be able to pump 5.6 gallons per minute, though it would be at the same pressure, and you would likely never see the increased flow, as you would have to open 3 - 2 gpm faucets fully to get that much water out.
I've seen it done on bus conversions- as much for redundancy as flow, with each pump able to be isolated.
Both pumps will shut off when they reach the pre-set pressure they are designed to work with. Unless there is something wrong with the pump you are using you will not see increased pressure. About the only advantage I can see might be you'd have more water flow ONLY when using two faucets at once. Maybe would be able to wash dishes while someone else showers.
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