[Shop-talk] LP Generator supply

[David Scheidt]

You need a low pressure regulator. Input is 10 to 15ish inches of water.  Output is 10 inches water. 
Steal the one from your furnace, if you need to. 


> On Aug 21, 2021, at 13:08, Jim Stone <1789alpine at gmail.com> wrote:
> 
> I am on Eastern Long Island, directly in one of the projected paths of Hurricane Henri.  We are being told to plan for 7-10 days without power, although FWIW we were only powerless for 4 days following Sandy.  Shortly after Sandy I purchased an LP Generator (https://www.jbtools.com/buffalo-tools-gen4000lp-4000-watt-propane-generator/?wi=off&gclid=CjwKCAjwyIKJBhBPEiwAu7zll1U54VH4euJneVO0jmOzjdgwy6-t0MUdEtaEHYXf_7W0sQxKo54TphoC__4QAvD_BwE) which, of course, I have never needed, although I do run it periodically to be safe.  It is designed to run off of LP tanks and comes with a standard regulator.  A little Googling shows the following specs for the regulator:
> 
> Low Pressure Regulator
> Inlet Pressure:               25-250PSIG
> Outlet Pressure:            280mmH2O= (11"W.C.)
> Flow Capacity(MAX):    119000(BTU/hr)
> 
> We use Propane for DHW and heat and have a 500 gallon in-ground tank.   I had an outside gas line stubbed out when the house was remodeled, just in case I ever needed it and I would like to be able to connect the generator directly to the house supply and avoid having to depend on the portable tanks.  The house supply is regulated and, as an example, here are the specs for the water heater:
> 
> Max Inlet Gas Pressure:    13.0 “W.C.
> Min Inlet Gas Pressure:     8.0 “W.C.
> Recovery Rating:               206/Gallons/HR
> Max Working Pressure:     150psi
> Max Output:                       180,000 BTU/HR
> Max Input:                          11,000 BTU/HR
> Manifold Pressure:             3.9 “W.C. (For Max Input)
> 
> Am I missing anything, or should I be able to hook the generator directly to the house supply without the regulator?  For the record, I tried it once with the regulator attached and it barely ran and didn’t put out any appreciable power.  I always meant to research this before I needed it, but like many of us, never got around to it until now.
> 
> Thanks,
> Jim
> 
> 
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