Genesis II S-435 Propane to NG


 
MikD said:
I finally got a connector that would work with that Uharbour manometer. It pegged the needle as soon as I opened the valve for the gas line.
I am assuming that means I have way over 35" WC, lol! So I will definitely need a regulator on the line.
Click to expand...
do you have a regular pressure gauge? I'm curious what your starting pressure is.

My house has a regulator at the meter like this one. I'm wondering what your setup has.

Do you have other NG applicances in the house?

1748995797594.png
 
We do have other gas appliances in the house and a similar gas meter outside. I know the tankless water heater says its max inlet gas pressure is 10.5"WC. The gas stove has a sticker on it listing the manifold pressure as 5" WC for natural gas. We also have a gas fireplace that lists max inlet pressure at 10.5" WC and gas furnaces, but I don't know what they are listed at. So I am confused why the manometer buried the needle.

Not sure if this will help, but it was the only readable piece on the gas meter.
meter.jpg
 
This is the NG regulator that comes from Weber for the NG version of this grill.

EDIT: according to an email from Weber, they do not include regulators for their NG grills. The part number is for a NG Bulkhead assembly. When I saw it on the seller's website with the regulator, I just assumed that is how it came from Weber. So either their customer support is misinformed or the seller kindly added a regulator. One of those possibilities seems way more likely, lol. However, I have to say Weber's CS has been very friendly and helpful so far.

Reg.jpg

If I am reading this sticker correctly, it requires a 1/2 PSI input at max and will output between 3.3"-6" WC. Does that sound correct?

reglabel.jpg

IF so, then that means I need to have a regulator on the home NG line that drops the pressure at the outlet to no more than 1/2 PSI or 13.8" WC.
I believe that is what the plumber said it will drop to, but I will verify with him.
 
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MikD said:
This is the NG regulator that comes from Weber for the NG version of this grill.
View attachment 113931

If I am reading this sticker correctly, it requires a 1/2 PSI input and will output between 3.3"-6" WC. Does that sound correct?

View attachment 113932

IF so, then that means I need to have a regulator on the home NG line that drops the pressure at the outlet to 1/2 PSI or 13.8" WC.
I believe that is what the plumber said it will drop to, but I will verify with him.
Click to expand...
Not correct. The 1/2PSI is sort of an upper "safety limit" of what the thing can operate at without leaking or failing. NG pressure in a home is typically 7"WC which is typically only about .25 PSI that is 1/4 not 2.5 or 25 but .25 And it takes more than a simple regulator to convert one. You need the manifold as well
 
MikD said:
We do have other gas appliances in the house and a similar gas meter outside. I know the tankless water heater says its max inlet gas pressure is 10.5"WC. The gas stove has a sticker on it listing the manifold pressure as 5" WC for natural gas. We also have a gas fireplace that lists max inlet pressure at 10.5" WC and gas furnaces, but I don't know what they are listed at. So I am confused why the manometer buried the needle.

Not sure if this will help, but it was the only readable piece on the gas meter.
View attachment 113840
Click to expand...

Perhaps you got a bad manometer?

The tankless water heater should be easy to test with your manometer as it likely has easy access to the gas line and a shutoff right before the flexline. I'm curious what the manometer reads there?

You could buy a low pressure gas gauge and test the lines inside, and outside. HD has one for less than $10. It is probably not very accurate under 1 PSI, but if it is the same reading inside by your water heater and outside and both barely move the needle on a gauge like this, I'd suspect the manometer.

On the flip side, if your pressure outside is higher than inside, perhaps you have a second pressure regulator in your house.


1749232636281.png
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JONES STEPHENS 30 PSI Pressure Gauge with 2 in. Face and 1/4 in. MIP Brass Connection G60030 - The Home Depot

Visit the Home Depot to buy Jones Stephens Gas Test Gauge G64030
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DanHoo said:
FWIW, his first post lists a replacement manifold is on his list of things to acquire.
Click to expand...
Yes, I got a manifold as was suggested for the correct/safest way to do the conversion. Sorry this has apparently dragged on. I was hoping it might be helpful to anyone attempting such a conversion.

FWIW, all the parts are here and the I assembled the grill. I just need to do a leak test and then see if it lights up without incident. I think it will be best to wait on the plumber before doing that though.

Thank you all for your help, it is greatly appreciated.
 
MikD said:
Yes, I got a manifold as was suggested for the correct/safest way to do the conversion. Sorry this has apparently dragged on. I was hoping it might be helpful to anyone attempting such a conversion.

FWIW, all the parts are here and the I assembled the grill. I just need to do a leak test and then see if it lights up without incident. I think it will be best to wait on the plumber before doing that though.

Thank you all for your help, it is greatly appreciated.
Click to expand...
Hopefully all goes well and you have a good running grill
 
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