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Thread: Water pump opinion wanted

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    Default Water pump opinion wanted

    Spring is coming, the yard will be flooding....

    I want to buy a gas powered water pump to drain my yard.

    I have a 150' of 1.5" fire hose for the discharge. It seems Princess Auto no longer sells a 1.5" pump. However they have a 2" pump on sale now. Would I run into any problems if I reduced the output to 1.5"?

    In my mind it should be ok, the specs say output is 36 psi 9480 gph. So there should be no problem with the hose, just a volume reduction.

    Your comments are welcome...

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    There should be no problems with reducing the output size from the pump, the pressure should be OK as it will go up,(you will gain about 8 Psi) and your output hose can handle it, but as you stated the volume of water pumped will drop.
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    Quote Originally Posted by Terryl View Post
    There should be no problems with reducing the output size from the pump, the pressure should be OK as it will go up,(you will gain about 8 Psi) and your output hose can handle it, but as you stated the volume of water pumped will drop.
    Hose pressure won't change anyways....only pump pressure before the reducer.

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    Quote Originally Posted by The Noof View Post
    Hose pressure won't change anyways....only pump pressure before the reducer.
    Any risk to life of the pump?

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    I don't see how sir.

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    Should not have a problem unless it puts a more of a load on the engine if it does a governor adjustment will fix that.

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    Well, I went out and bought one of the pumps. On sale for $199 so I'll give it a try when the spring flood comes.

    Just reading the manual. it specifically says "Do not use a hose with an inside diameter smaller than the discharge port". Oh well, I'll do it anyway.

    PS - The manual has a chapter called "What is head" - no it's not what you think.
    Last edited by dogdayz; 03-12-2019 at 01:15 AM. Reason: sp.

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    Quote Originally Posted by The Noof View Post
    Hose pressure won't change anyways....only pump pressure before the reducer.
    I was talking about the internal pump casing pressure.
    And if you not pumping the water uphill or up and over anything then you don't have to worry too much about head elevation.
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    Now if only I could find a 2" female to 1.5" male threaded coupling.

    Can't seem to locate one in ABS or anything else. I can do it by piecing together a few fittings but the cost goes up.

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    You might look for a 2" to 1-1/2" threaded reducing bushing, then thread a 1 1/2" inch pipe nipple into it, I don't think they make a standard PVC part the reduces down like you want.
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    Found what I need on Amazon but too expensive. I guess I'll have to get creative with cheaper fittings.

    Moon 369-2061524 Aluminum Fire Hose Adapter, Rocker Lug, 2" NPT RIG RL Female x 1-1/2" NH Male
    Last edited by dogdayz; 03-12-2019 at 05:31 PM.

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    Never use PVC on a gas powered pump, it will crack, you need to metal, JMHO.

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    Quote Originally Posted by dogdayz View Post
    Found what I need on Amazon but too expensive. I guess I'll have to get creative with cheaper fittings.

    Moon 369-2061524 Aluminum Fire Hose Adapter, Rocker Lug, 2" NPT RIG RL Female x 1-1/2" NH Male

    Maybe Princess auto can help with the fittings?

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    Quote Originally Posted by The Noof View Post
    Maybe Princess auto can help with the fittings?
    They have a lot of cam-lock couplers for water pumps but not a threaded reducer like I need. I live out of town so next time I'm in the city I'll go to Lowes. They should have something that I can put together.

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