black pipe size

[SM1]

Hi all,
I want to install a reznor 75 and I want to make sure I can deliver it enough gas to run, I have 1 inch or 1 1/4 coming into the house about 25 feet long stops at the furnace and from there they fed the furnace and the rest of the house with 1/2 inch, the run from the main line to the gas dryer is 40ft. I was going to tie off of the dryer with 1/2 inch and continue the run for another 30ft. into the garage, will I have enough gas to run the heater if not can I tap off of the 1/2 inch to a 3/4 and then 1/2 inch again to tie into the heater and can I do this from the point of the dryer in other words can I upsize to increase delivery without changing all the 1/2 inch pipe. Thanks

 

[tigmusky]

I can't say for sure if either way will work. If you take off from the dryer 1/2'' you may not have enuff gas to run the both at the same time with or without the 3/4'' pipe.
It's hard to say without seeing the set up. If you can I would tap in back at the 1'' and add a tee and run the line form there. It would be be a longer run. you can use soft copper with flare fittings might make things easier. Is there a reglator on the gas line before it splits off. if yes you could come off the 1/2 dryer line and add and move the reg.


daye

 

[SM1]

Thanks for the reply,
Not sure about the regulator and tapping in at the 1" pipe would be a heck of a job since the basement is finished, I may have to call someone in to look at this I'm trying to keep the job small seems like everything turns into a major project then again I may just try it with the 1/2" and see what happens. Thanks

 

[Torque1st]

Your installation manual should have pipe size information in it. If you do not have the manual many can be downloaded. You will need to tap back in to the main line or upsize the dryer line and then continue on.

 

[Tyrol67]

Based on a chart I have left over from my generator project, it looks like you'll be undersized. 70ft of 1/2" will carry 46 CFH. About 1,000 BTU is approx. requires 1 CFH. Your dryer is about 30-40,000 BTU and I'm assuming the Reznor 75 is 75,000 BTU? You also have to factor some losses for fittings. 70 ft of 3/4" will carry 96 CFH so that should work with your heater if the line is dedicated to the heater. I had to re-pipe my basement due to the addition of a dyer, gas stove etc. Had the same problem with the finished basement, so we ended up just exposing the pipe, which is probably safer anyhow. I'd suggest getting someone to just run some Gastite for you. It is SS, vinyl plastic coated flexible line. It installs very fast. May be pricey per ft., but a ton less labor. Worth looking into. I got this great suggestion from an HVAC friend after I spent about 12 hrs repiping with iron.

You should be able to find some capacity charts on the net or on some generator sites.

 

[dipper]

12 hrs with iron is a bargain versus repiping your whole basement with csst. CSST (corrugated stainless steel tubing) is expensive!!!!!!!

Once you drop to 1/2" it does no good to go back up to 3/4". I would get back to the tee and go from there with 1" as far as you can go and then drop to 3/4" and then convert to 1/2" into your heater. Do it right the first time, but CSST is expensive. 1" black pipe is about 1.40 per foot in quantity and you can easily install it yourself. CSST is probably $5.00 per foot.

 

[SM1]

You Guys are right I better go back to the main and either dedicate a line or extend the 1" run. Thanks, Steve

 

[Torque1st]

Think about other things you may want to use gas for like a gas grill, fireplace, forge, gas stove top, etc as you extend the main line.

 

[SM1]

Ok I had a plumbing contractor come out and ofcourse he can't touch the job unless he fixes the code violations first he said gas line running through cold air return but this is what he will do.

1. pull the permit
2. from furnace run 1" black pipe and connect to furnace, hot water, 1st floor fireplace and stub for outdoor firepit .
3.cut three 2x2 access holes in finished basement ceiling to expose ceiling.
4. run 40' 1" black pipe to crawl space.
5.branch off the 1" and tie in the 1st floorstove, fireplace 2, dryer, outdoor grill.
6.run 3/4 pipe off 1" in crawl space to garage for reznor hook up.
7. hang customer supplied reznor furnace connect gas to unit run electric and B vent.
8. make all proper connections and air test lines, turn on gas light all fixtures.
9. clean job site check for proper operation.

$6100.00 total, does not include fixing the 2x2 cut outs in the basement ceiling.

Any thoughts, is this fair? Thanks, Steve

 

[tigmusky]

yikes!!! that maybe a fair price if you are rich. wheres gas meter at ? wheres is your garage at to the house do you live in the city. give us as much info and pics as you can. We can do better than $6100.
daye

 

[SM1]

Hi Tigmusky thanks for replying, the gas meter is on the west side garage on the east furnace almost centered gas meter to furnace 30' furnace to garage 45', garage is attached to house on kitchen north side, live in the suburb of Cleveland Ohio.
The 1" pipe comes in from meter to furnace where it stops then they are feeding the furnace and everything else from there with 1/2" pipe, through the finished basement straight shot 30' to crawl space where it branches off and feeds dryer stove fireplace 2 and they also branched off a few years back with csst about 35' to outdoor grill.

 

[Torque1st]

Get some more estimates.

 

[tigmusky]

on some gas meters have a take off , before it go in the house. you maybe able to come off and bury the line. or you could get a 250 gal propane tank and set on the backside of the garage.

Daye

 

[SM1]

I thought about dedicating a line for the heater but now I feel I may be starving my other appliances since the run of half inch is way to long for the btu"s on all the appliances it feeds so I figured I might as well correct the situation.

It does seem as though the dryer takes too long to dry clothes and the oven takes too long to get up to temperature the other night I put the fireplace on and it seemed the flame was a little lazy and hot water seems to fall a little short as well so I wouldn't doubt that I'm undersized for what I'm running and especially reading the post here you guys would know better than anyone else about that.

But it seems that to correct the problem from one contractor so far would be $6100 really too steep for me, I will call others and see where they come in at.

But you know what ***** the most, and this isn't meant to offend anyone on this forum but why do some contractors size you up look to see what you drive how you live how nice your house is, why can't they just give you a fair price regardless of how well you live and by no means do I live well but I do have some nice things that I put a lot of blood sweat and tears into so my family could enjoy, I find this a lot with all service trades so when a fair person comes along you automatically think they will skimp on the job when it might not be true at all, I guess thats why you get references. sorry for the long post and thanks for any and all advice. Steve

 

[Aceman]

Heating & Air Companies will run gas line too, if you're looking for more options.

 

[SM1]

Thanks Aceman that helps, Stay tuned!

 

[dipper]

You may even get a better price by getting a handyman in there that has some experience running the black pipe. You could pick up all the materials from the local box store and even lend a hand installing. When it's all done you can call in the local gas company provider and have them do a sniff test before you close up the ceiling and turn it on.

Running black pipe is relatively easy, and with tight connections and proper pipe dope it's pretty hard to get leaks. You can test for leaks with soapy water too.

Just another option for you. $6100 for that seems insane!

 

[SM1]

Hey Dipper thanks I never thought about the gas company testing the pipe, I definately could do the work and it wouldn't hurt to get someone to help. Thanks again, Steve

 

[tigmusky]

for a pro to come out and do this should take no more then 2 days labor . 16 hours @ 110.00 to 130.00 dollars an hour . just a guess from what i read. 6100. sounds more like a whole new hvac system. do you have any friends in the trades plumbing,pipefitting or handyman. try to find a guy to do it on the side. With times like this people are huragy for work. Rent a pipe threader for the weekend and do it yourself . Daye

 

[SM1]

Thanks, now that you mention it that is exactly what I spent on a trane xl90 100,000 btu furnace and a 14 seer 3.5 ton trane air conditioner along with labor and a new SS flue for the chimney, I thought something was wrong.

I am going to do this myself, Thanks Guys.

 

[ironroad 9c1]

yea I called today to have my gas company give me a idea on moving my large tank,and running about 15ft max of 1/2 line to my heater and hooking to it and testing and that was about 500 bucks.