Gas line size.

[Maverickcustomrods]

I am looking to run a gas line and install a heater before it gets too cold and wondering what size gas line to run. I Have electrical and thermostat wire roughed in just need to run the gas line. I will tie the gas line into the area in my mechanical room that feeds our furnace, water heater, fire place, and dryer. Wondering what size csst piping I should use to feed a 60,000 or 50,000btu heater. Run will be approximately 60-65’

 

[Wheelingit]

We need to know whether this is LP or natural gas. Also, what type of pipe,black, copper or csst. And will this be a 2lb system or standard low pressure.

 

[ljhhontx]

offhand 1" should be good

 

[Maverickcustomrods]

Natural gas, csst. It will be the same pressure as what supplies the other appliances I mentioned. Looks as though all the other appliances are using 1/2 soft copper.

 

[Wheelingit]

You will need to use 3/4" for csst according to the sizing chart.

 

[D45]

I ran 3/4" black pipe, around 65' for my 75k heater

 

[nadogail]

Considering the above postings, 3/4" Black Iron, IMHO, will work.

 

[stokefire7]

I am looking to run a gas line and install a heater before it gets too cold and wondering what size gas line to run. I Have electrical and thermostat wire roughed in just need to run the gas line. I will tie the gas line into the area in my mechanical room that feeds our furnace, water heater, fire place, and dryer. Wondering what size csst piping I should use to feed a 60,000 or 50,000btu heater. Run will be approximately 60-65’

A couple questions:
1) How far is the meter from the mechanical room ?
2) What size pipe is running from the meter to the mech room ?

 

[Maverickcustomrods]

A couple questions:
1) How far is the meter from the mechanical room ?
2) What size pipe is running from the meter to the mech room ?

It appears the pipe labeled “main” is 1/2” and labeled 2psi, there is then a regulator and the dryer, furnace, fireplace, water heater are also 1/2” soft copper are after the regulator.

Where the main line connects to the regulator and appliances is about 25’-30’ from the meter.

 

[stokefire7]

...sounds like propane, eh ?

 

[Maverickcustomrods]

...sounds like propane, eh ?

We are on natural gas.

 

[stokefire7]

...being in Illinois, I wasn't sure I had books and ****. Yer in luck !

 

[stokefire7]

Alright, we'll need to readjust.
2 lb. system.
commercial setting I presume ? (Not familiar with two pound residential service)
..so, reg on two pound, bumped down to a manifold feeding those appliances ?

 

[stokefire7]

Apparently, you don't have the sulfur content in the gas that we have in the west.

 

[Maverickcustomrods]

Alright, we'll need to readjust.
2 lb. system.
commercial setting I presume ? (Not familiar with two pound residential service)
..so, reg on two pound, bumped down to a manifold feeding those appliances ?

This is residential.

 

[stokefire7]

https://up.codes/viewer/minnesota/mn-fuel-gas-code-2015/chapter/4/gas-piping-installations#4

Start here.

 

[HoosierBuddy]

To run CSST you need be be trained and qualified (this is a National Fuel Code requirement).

The CSST Manufacturers provide that training, typically in the form of a book you can get from the place you buy their product or online just do a google search. You just read the book, understand it, and then basically you are trained.

That book will likely include tables that tell you how many BTU's each CSST line size can be used for based on the length of the run.

It will also talk about bonding requirements. Do not ignore that part. It is necessary to prevent fires in the event of lightning strike. If you decide to run steel lines with malleable iron fittings, no special electrical bonding will be required.

I do not have a calculator for CSST, but I did run the calculation for you on 1/2" PE Tubing (the closest I have in my program) and it showed at 2PSI inlet the 1/2" would handle the 50K load with only a very slight pressure drop. You will have to put a regulator at the end of the run before the appliance to cut from 2 PSI to 7 inches water column (or whatever your heater requires).

Phil

 

[59 wagon man]

offhand 1" should be good

i guess you never sized a gas line .type of gas, fittings, pressure,length of piping. all other appliances on the line and the btu's needed. should be good doesn't always cut it
plus this is one of those cases where you need to check local building code not garage journal. lets just say an unfortunate accident resulting from a gas leak may void all your insurance if not installed properly. one township to the next can have a different code

 

[stokefire7]

I am looking to run a gas line and install a heater before it gets too cold and wondering what size gas line to run. I Have electrical and thermostat wire roughed in just need to run the gas line. I will tie the gas line into the area in my mechanical room that feeds our furnace, water heater, fire place, and dryer. Wondering what size csst piping I should use to feed a 60,000 or 50,000btu heater. Run will be approximately 60-65’

Still around ?

 

[Maverickcustomrods]

I ended up running 1/2” black pipe today. That was recommended to me by the place I bought the furnace, I will need to add a regulator at the end to reduce down to .5 psi. Pressure tested everything and it held air, no leaks. Will mount the furnace and vent this coming week.

 

[mobetta]

FYI black pipe is usually NOT used by the pros as it is illegal to bury it in the ground. . it is also illegal to have threaded fittings inaccessible (inside a wall, for example) so generally they use soft copper or CSST. there are also press fittings for BI pipe that CAN be hidden in the walls.