Just jumping in here to correct the misinformation.
Standard Natural Gas delivery pressure in the U.S. is generally 7 inches
water column (if your altitude is not too high above sea level) or about 0.25 PSI. Most natural gas appliances require an inlet pressure in the range-ish of, say, 5 to 14 inches water column (less than 0.5 PSI) in order to operate and the gas valve in the appliance then regulates down the small amount necessary for proper combustion.
Anything over about 1/2 PSI will require the customer regulate at some point in front of the appliance. This could be at a manifold in the house, at each appliance, etc....but in no case should the pressure be higher than the appliances maximum inlet pressure rating (as noted in your appliance's owner's manual) at the appliance's gas valve (OR) it may damage the gas valve or the appliance may overfire, which could damage it and will create a safety hazard.
Some residential customers have asked their gas company to supply pressure at more than 1/4 PSI. The majority of these are 2 PSI setups where the customer has CSST piping (or some other issue piping issue) where they want 8 times the normal delivery pressure. These customers (as stated before) must regulate that pressure down somewhere before the appliance.
The only way I would know for sure what pressure the OP is receiving would be to go to his house and install a gauge in his piping and read it. I could look at a picture of his gas pressure regulator at his gas meter and hazard a guess BUT...regulators are typically adjustable to some degree as to outlet pressure, most if not all of them can be equipped with stiffer or lighter springs to change the output pressure range off of what the regulator was originally stamped....and SOME customers in the U.S. don't even have pressure regulators at their meters because the regulation is done by the gas company prior to their service line (low pressure systems).
So...not sure where the guys above got some of the info posted....but thought I'd try to clear it up.
Phil
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gas regulator question Author: waukeshaplumbing (WI) i have a tankless water heater project coming up. they will be installing a 2lb meter for me.
since its winter in WI i will need to be there when they install the meter to install the regulators and get things going
my question: can the 2lb gas regulators be installed on a normal pressure system....i assume it needs to actually BE 2lbs for the regulators to work properly
im just wondering if i can install them ahead of the meter
?natural/lp.Max cfu?Define branched to max outlet?Vented by local or not?Mostly they install. You route to and connect.They will limit the distance.have they sited the install point?
You want to add up the total btus of all the gas appliances in the house, and have them provide a meter rated for enough cfh. A cubic foot of gas is roughly btus. They will regulate down on their side of the meter. I just read a posting on heatinghelp.com regarding this, and technically everything prior to the meter belongs to the utility co., and you are not suppose to touch it(you could be arrested). If you do not get a w.c. reading equal to what the manufacturer recommends, they must adjust it. This fact came at quite a suprize to the plumbers there, as they had been adjusting for years.
quote; This fact came at quite a suprize to the plumbers there, as they had been adjusting for years.
I have never known any jurisdiction where you were allowed to work on ANYTHING ahead of, and including, the meter, of any utility. Here, it is a minimum $10,000.00 fine if you "tamper" with the utility's pipe or meter.
For more information, please visit Gas Regulators Suppliers.
its an old house...im adding a tankless
were going to 2lb gas to handle the gas demand
i want to know if 2lb regulators will work w/o 2lb gas meter installed
i assume it NEEDS the 2lb side for the regulator to work correctly??/?
i dont need help designing it....
It will reduce the OUTLET pressure to 6" w.c. regardless of the inlet pressure. If you went the other way, however, and used a low pressure regulator on a 2 psi system, it would "lock up" and not let any gas through it.
wauk.....I suggest you go to heatinghelp.com, and ask Tim McElwain in the gas section.He runs a training institute in Rhode Island for gas, and is really knowledgable. Sorry, if I annoyed you. It must be a very large structure, or have complicated piping for you to consider regulating all the appliances, opposed to increasing the piping.
Edited 1 times.
so i can install the regulators and the next day it can change to 2lb??? and all the appliances will still work?
its not the answer i expected....im going to have to call Maxitrol to verify
If your system is 10" the regulator will reduce it to 6", it is 5psi it will reduce it to 6". They are rated for a MAXIMUM pressure, not a minimum. The spring ONLY controls what the outlet pressure is.
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