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Thread: Two Stage gas line question

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    Two Stage gas line question

    Apologize but I did not read the getting started suggestions before posting to a thread that was over a year old.


    I have not been able to find information for my situation. I am upgrading from a 250 BTU Jandy lite 2 that has worn out. I had it professionally installed 12 years ago (permits etc) but was not attentive enough as to the requirements. I am running a two stage system now. It is a 2 psi Delivery from the gas meter with Mult. 1.07 in a 1" flex running for 150' down hill to the heater. I want to go up in BTUs to 400 if possible. Not that I need it to heat, but just to do it quicker. Gas company says it shouldn't be a issue. But for some reason I didn't hang up the phone after talking with them very confident. I do not want to kill a new heater by not having the volume I would need. From reading some discussions here in earlier posts, it sounds like some of you have some experience with what I am going through.

    Can anyone reference a web page that I could look at which has the two stage calculations and distances? Or answer as to if I am capable with set up I have now in place to step up to above 250 BTUS without harming a new heater ?

    Also I am looking at Jandy/ Hayward/ and Lochinvar so far if anyone has recommendation.
    Thanks
    10000 Gal Gunite with water fall
    250000 Teledyne Lite 2 Heater presently
    PentairWisper-flow pumps for pool 2hp and waterfall 1hp
    Sand filter
    Salt Water Chlorinator

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    Re: Two Stage gas line question

    1" "FLEX" line? Are you talking about a polyethylene line?

    I would hire a qualified gas or plumbing company to do this work.
    Paul
    http://www.gastekservices.com A word of caution: When working with gas and electrical you might want to consider a licensed contractor. Consider the value of your life and others around you. If you would like to provide a review of the help I provided, please use the following link to leave a review. gastek - Google Search,

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    Re: Two Stage gas line question

    I will "second" Paul on this one. There are too many variables to consider with an install like this. Number of bends in the pipe, valve restrictions, etc are a few. It is best to have an experienced gas fitter on site to evaluate this
    Unknown make 18' above ground (bought used in 1999) Sparco sand filter. Hayward 100,000 BTu heater. 2 speed pump

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    Pool Tool's Avatar
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    Re: Two Stage gas line question

    Spokane - Just to make sure I get this right. Existing equipment: 2# Delivery Regulator feeding a 1.07 I.D. flex line running ~ 150' to a 250 BTU heater. Correct?
    I am assuming you are delivering 2# gas to the existing heater where an "appliance" regulator is cutting pressure from ~2# to 6-8" WC or whatever your heater currently operates at. Correct?
    You want to leave everything the same except replace the 250 BTU heater with a 400 BTU heater. Correct?
    See this, bottom of page 15. http://www.pentairpool.com/pdfs/MasterTempOM.pdf
    Per that link, you will have adequate gas supply through your one inch gas line to run the heater. You will have to verify that the meter has adequate capacity for the increase BTU and that the appliance regulator at the heater also has sufficient capacity. A plumber can easily do this and I suspect both will be completely fine.
    Good luck.
    16' x 32' (21100 gal), vinyl, 1.5 hp Hayward SuperPump,
    Tagelus TA60/60D Sand Filter, Raypak 399K Digital Heater, TF-100

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    Re: Two Stage gas line question

    Quote Originally Posted by pool tool View Post
    spokane - just to make sure i get this right. Existing equipment: 2# delivery regulator feeding a 1.07 i.d. Flex line running ~ 150' to a 250 btu heater. Correct?
    I am assuming you are delivering 2# gas to the existing heater where an "appliance" regulator is cutting pressure from ~2# to 6-8" wc or whatever your heater currently operates at. Correct?
    You want to leave everything the same except replace the 250 btu heater with a 400 btu heater. Correct?
    See this, bottom of page 15. http://www.pentairpool.com/pdfs/mastertempom.pdf
    per that link, you will have adequate gas supply through your one inch gas line to run the heater. You will have to verify that the meter has adequate capacity for the increase btu and that the appliance regulator at the heater also has sufficient capacity. A plumber can easily do this and i suspect both will be completely fine.
    Good luck.
    ^^^^ this
    14,000 gallon IG, Vinyl. Hayward 3/4 hp superpump, Penatair IC40 SWCG, Pentair automation, Hayward sand filter, Aqua Comfort heat pump, Hayward 400k Lo-Nox LP heater.

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    Re: Two Stage gas line question

    The first stage should be delivering enough volume to the second stage, providing the numbers you are giving are current. Like everyone has been saying, you WILL need a guy to come out and readjust your second stage to accommodate the increased demand (400K btu). If he's good, he should at least check the first stage too.

    If it is flex, there shouldn't be any fittings, stand pipes should be large radius sweeps, and can be considered (for calcs) to be one straight continuous run.
    Factory Warranty Station for:
    Jandy/Zodiac, Pentair, Sta-Rite, Raypak, Polaris,
    and Paramount pool cleaning systems.

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