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It's called tuition

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  • It's called tuition

    Got a call from my foreman on a job where the back up generator won't fire properly. When the generator fires, the line pressure goes down below 7" wc which will not sustain the machine's motor. We installed a 2" regulator on a 2lb line feeding the generator. The questions asked when we ordered the regulator were incoming pressure and downstream demand. I wish they had asked us our wc requirements or what type of appliance we were feeding. The regulator came with a 5.5"-8" wc spring (standard for domestic appliances). Turns out we need an 8.5"-14" wc spring. And, guess who gets to buy and install the replacement spring? Mental note: When ordering a gas regulator, remember to include incoming pressure, CFH demand, appliance pressure demand in water column.

  • #2
    Re: It's called tuition

    my boss has done this to me a couple time when he orders the regulator
    Charlie

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    • #3
      Re: It's called tuition

      Dog Gone how many KVA is that beast.The one I did for an entire grocery store only required a 1"@ 160' gas line.

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      • #4
        Re: It's called tuition

        i did a 100kw for a home in beverly hills a couple years back. the electrician was the general and i informed him to have the gas co. come out and verify that they have a large enough main. the gas co came out and fortunately i saved all our email correspondence. a year later when the owner moved in, the main was not large enough to power the 2'' line for the generator and the 3'' house line

        the gas company wanted $50,000 to bring up a new service from the street down below. it was a 400' uphill winding driveway.

        the electrician was panicked. he had already lost his project manager and had no access to his files. he calls me for help and withing minutes, i emailed all the gas company notes they sent out to us

        gas company ate it

        rick.
        phoebe it is

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        • #5
          Re: It's called tuition

          Originally posted by PLUMBER RICK View Post
          i did a 100kw for a home in beverly hills a couple years back. the electrician was the general and i informed him to have the gas co. come out and verify that they have a large enough main. the gas co came out and fortunately i saved all our email correspondence. a year later when the owner moved in, the main was not large enough to power the 2'' line for the generator and the 3'' house line

          the gas company wanted $50,000 to bring up a new service from the street down below. it was a 400' uphill winding driveway.

          the electrician was panicked. he had already lost his project manager and had no access to his files. he calls me for help and withing minutes, i emailed all the gas company notes they sent out to us

          gas company ate it

          rick.
          Good to have subs willing to help and watch out for one another.


          J.C.

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          • #6
            Re: It's called tuition

            I had a large generator for a restaurant last year that the low pressure alarm would go off when it had a load
            I started with a 1 1/2" line 30 ft from the meter ,,
            Ended up running 2lb right to the unit and installing a reg there
            If the pres got below 9" the alarm would go off ..Set it at 12" with a load and never had any more problems
            It sucked a lot of gas

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