# Thread: Gas pressure for pool heater

1. ## Gas pressure for pool heater

Hi all, I contacted my local gas co. And the person on the phone said I have 7-inw rated gas pressure?
They were not sure how to convert that to psi?
Does anyone know how to convert inw to psi or whatever?
If noone knows I will call and ask for an engineer to call me
Tried google but no luck

2. ## Re: Gas pressure for pool heater

Are we talking propane or natural gas? I wonder if they are referring to vaporization rates for propane tanks? Your tank must be large enough to keep it from frosting up. Large pool heaters need a large enough tank to keep the gas from getting too cold when it is vaporizing. That might be what they are talking about.

3. ## Re: Gas pressure for pool heater

How many cubic feet can your meter give you. You'll get just under 100K BTUs per hundred cubic foot. A decent manometer will have both scales. As for plumbing, this is not a DIY job. You need a certified Gas plumber.

Scott

4. ## Re: Gas pressure for pool heater

Multiply inches of water column by 0.036 .
One PSI is equal to 27.7 inches of water column.

5. ## Re: Gas pressure for pool heater

well, if i am doing the math correctly thats .252 so i am thinking its 1/4 lb service, man i was hoping for at least 1/2 lb
the engineer is supposed to call me but it looks like the upgrade might not be free as customer support said the engineer would tell me how much?

6. ## Re: Gas pressure for pool heater

Tell them you are planning to add a whole house generator too... That should bring up demand and prompt them to give it to you free. Worked for me!

7. ## Re: Gas pressure for pool heater

If your gas line(to the pool heater) is sized properly, just tell the gas co. that you are adding 400,000 to the gas demand on the property. They(the gas co.) should know what size to install. You don't need to confuse things by involving an engineer.

8. ## Re: Gas pressure for pool heater

They replaced my meter when I told them I was putting in a 400k gas heater. On top of my 125k btu furnace, two 40k btu fireplaces, hot water heater and stove. They dropped in a new meter at no cost that could handle 1 million btu's. All are working fine.

9. ## Gas pressure for pool heater

Originally Posted by Pool Clown
You don't need to confuse things by involving an engineer.
Hey easy on the engineer's
I don't have a choice, he will be installing it also

10. ## Re: Gas pressure for pool heater

I wondered about this when I built my pool. Centerpoint, our local natural gas utility, wouldn't do it for free--and I tried. They wanted \$375 to install a larger meter. I passed and it hasn't been a problem. The gas plumber who installed my pool heater said I would only need the larger meter if I was running every heater in my house (being in Houston I rarely do), my gas fireplace, my gas grill, and all six burners on my stove top all at the same time. I figured it was overkill and I was right.

But if they'll do it for free, why not?

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