NH LP gas pluming codes


  #1  
Old 03-17-10, 06:52 PM
T
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NH LP gas pluming codes

- Title should say "plumbing" :-)

I am getting a generac 5501 standby generator and I'm interviewing a couple of plumbers to do the gas piping. The problem is that I've got different options and I want to make sure I ask the right questions.

The generator uses 1.7 gal/hr LP. I have one of those copper 1/2" or so high pressure lines buried from the tank to the side of my garage. It goes into a pressure reducer/regulator, then into 1-1/2" flexible pipe across my garage, then back to black pipe 1-1/2" that goes into the ground with coated plastic wrapped black pipe. Finally it comes up from the ground and goes through an el into the house.

There is a reason I'm throwing out all these details. I need to tie the generator into this piping. The one service person I talked to wanted to run black pipe above ground from after the regulator on the garage to the generator. The problem is that he wants to run this above ground and it would require posts to support it and be a real eye sore. I want to do a below ground pipe instead. Why can't they use the same coated plastic black iron pipe they buried elsewhere for this small job? It is only 6 feet from the regulator. How deep do they need to bury this?

The other option he offered was burying more 1/2" copper and putting another regulator right next to the generator. But them there is a venting problem, so another above ground vent pipe would have to be run!

So please help me figure out what can get done for what appears to be 3 options:
1) Black pipe above ground with posts.
2) Copper pipe below ground with regulator and vent pipe.
3) Plastic coated 1-1/2" buried black pipe. Not sure why this one was not given as an option?
 
  #2  
Old 03-18-10, 07:08 PM
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Red face

I got such a big response I figure I'll talk some more and bore everyone. My other post on electrical had some responses so I guess the electricians are more interested...

Anyway, I checked out my neighbors standby generator and I see a flexible gas pipe coming right up out of the ground feeding his! I'll have to ask him about it. He does everything by code so I'm sure it is legit...


Originally Posted by tradetree
- Title should say "plumbing" :-)

I am getting a generac 5501 standby generator and I'm interviewing a couple of plumbers to do the gas piping. The problem is that I've got different options and I want to make sure I ask the right questions.

The generator uses 1.7 gal/hr LP. I have one of those copper 1/2" or so high pressure lines buried from the tank to the side of my garage. It goes into a pressure reducer/regulator, then into 1-1/2" flexible pipe across my garage, then back to black pipe 1-1/2" that goes into the ground with coated plastic wrapped black pipe. Finally it comes up from the ground and goes through an el into the house.

There is a reason I'm throwing out all these details. I need to tie the generator into this piping. The one service person I talked to wanted to run black pipe above ground from after the regulator on the garage to the generator. The problem is that he wants to run this above ground and it would require posts to support it and be a real eye sore. I want to do a below ground pipe instead. Why can't they use the same coated plastic black iron pipe they buried elsewhere for this small job? It is only 6 feet from the regulator. How deep do they need to bury this?

The other option he offered was burying more 1/2" copper and putting another regulator right next to the generator. But them there is a venting problem, so another above ground vent pipe would have to be run!

So please help me figure out what can get done for what appears to be 3 options:
1) Black pipe above ground with posts.
2) Copper pipe below ground with regulator and vent pipe.
3) Plastic coated 1-1/2" buried black pipe. Not sure why this one was not given as an option?
 
 

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