Recirc Pump Gasket Repeated Failures

Discussion in 'General Plumbing Help' started by fx77, Feb 18, 2018.

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  1. Feb 18, 2018 #1

    fx77

    fx77

    fx77

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    Hi
    Have AO Smith hot water heater with recirc B & G pump just above the heater.
    The gaskets thrice have dried out and ruptured. Basement filled with water
    I have been changing the gaskets regularly and the last change was 6/2016 and latest flood was 5 days ago...
    Home water pressure is about 80 psi entering the home from the street

    I am looking for a commercial grade sealed bearing recirc pump that can be attached to the copper waterlines (there is a shutoff valve on each side of the pump)..This new pump should be able to be fitted with a soldered joint at each end or some kind compression fitting (?); so that I never again have to deal with the gasket problem...

    There have been three floods in the basement in 18 years costing thousands in repairs and salvage

    Thanks for the professional and best advice.

    DSC00307.jpg
     
  2. Feb 18, 2018 #2

    Geofd

    Geofd

    Geofd

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    have you contacted b+g to see what operating pressures
    they are rated for???? 80 psi is a little high normally
    there would be a prv dropping the pressure to about 60
    psi just a thought
     
  3. Feb 19, 2018 #3

    WyrTwister

    WyrTwister

    WyrTwister

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    Change the gaskets yearly ?

    Wyr
    God bless
     
  4. Feb 19, 2018 #4

    fx77

    fx77

    fx77

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    Two answers here ..I changed them June 2016 and another respondent said had not seen a gasket fail in 65 years???
     
  5. Feb 19, 2018 #5

    TomFOhio

    TomFOhio

    TomFOhio

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    We used Taco pumps on all boiler pump change outs and had no trouble with the gaskets. Sorry not a better answer for you.
     
  6. Feb 20, 2018 #6

    WyrTwister

    WyrTwister

    WyrTwister

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    B&G pumps used to be fairly good .

    Again , what pressure is the pump & gaskets rated for ?

    Around here , pumps are rarely used for residental water systems . Commercial , yes .

    Wyr
    God bless
     
  7. Feb 23, 2018 #7

    fx77

    fx77

    fx77

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    Problem solved. The pump was Tyco...my error in the post. There is no such pump with sweated joints powerful enough to handle the load of water flow in the system. Pressure is not a problem and PRV was not indicated.
    The issue was that there were flanges from a previous B &G pump which years ago had been replaced with a Tyco, and B & G gaskets which were incompatible with the seal necessary for the Tyco side of the pump.
    The solution was the replacement of the flanges with Tyco specific flanges, and a Tyco specific gasket.
    Thank you for the help
     

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