Rinnai 94lse outdoor install - Page 7 - Plumbing Zone

TheMaster · 11-05-2009, 10:24 PM

Quote:

Originally Posted by Killertoiletspider

In some areas the odorant added to Natural Gas will attack the Zinc in the galvanized coating, causing it to flake and clog control valves on appliances.

I tell ya seems like they could stop that in all areas of the country if they can stop it in one area. We dont have a problem like that here. Glad to know the info about others tho!

Killertoiletspider · 11-05-2009, 10:34 PM

Quote:

Originally Posted by TheMaster

I tell ya seems like they could stop that in all areas of the country if they can stop it in one area. We dont have a problem like that here. Glad to know the info about others tho!

Natural Gas properties vary across the country, hence the need for odorants having properties that work best with the gas in that area, Chevron alone makes about sixty different odorant formulas.

TheMaster · 11-05-2009, 11:24 PM

If the oderant attacks the zinc and you use black iron do you pitch the line? What about rust? I've had to replace black iron here under a house because it was full of rust. We used copper and converted it to a 2lb system.

Killertoiletspider · 11-05-2009, 11:31 PM

Quote:

Originally Posted by TheMaster

If the oderant attacks the zinc and you use black iron do you pitch the line? What about rust? I've had to replace black iron here under a house because it was full of rust. We used copper and converted it to a 2lb system.

No, with black steel pipe you provide a drip leg at every connection, but gas will generally not rust pipe from within, black steel pipe rusts from the outside in.

TheMaster · 11-05-2009, 11:41 PM

Quote:

Originally Posted by Killertoiletspider

No, with black steel pipe you provide a drip leg at every connection, but gas will generally not rust pipe from within, black steel pipe rusts from the outside in.

I realize it will rust on the outside but this black pipe rusted on the inside and was clogging up the furnace gas control valve. It was a low pressure system and low pressure systems here have moisture in them the gas company says so anyway. I've never found a high pressure house line that had water in it. 90% of the appliances here do not have a drip....I always install a drip at the appliance.

SPH · 11-05-2009, 11:58 PM

Quote:

Originally Posted by futz

Yes. Absolutely not allowed in B.C. We paint our outdoor pipes for corrosion protection here. Lovely Tremclad grey.

Not so. Regs can be installed in any orientation. What's causing you to think they need to be horizontal is our local inspectors' demand that the vent restrictor be oriented that way. I guess it's in the code somewhere - I don't know where - I don't do enough gas anymore to keep up with their constant changes. Guys who install the regs vertically just put a street elbow in the vent opening and screw the restrictor into that.

Anyway, an outdoor reg shouldn't need a vent restrictor anyway (or should it?...). Just aim that screen down so the reg doesn't fill up with rainwater.

I've never heard of any such rule.

It is a code requirement to have 2lb regs installed on the horizontal, check with the Safety Authority and he will tell you the same thing. There was an ammendment to the code in 2006. You also are not allowed to put elbows on the vent line to make the restrictor horzontal.

You should really check regularly for gas code ammendments if you are working with gas. It is your responsibilty as a gas fitter.

This is straight from the maxitrol website:

The 325 Series is suitable for multi-positional mounting. But when using the vent limiting device, the regulator (325-3L, 325-5AL) must be mounted in a horizontal upright position. Install the regulator properly with gas flowing as indicated by the arrow on the casting (also see the Safety Warning Instructions bulletin).

Vent limiters can only be installed in regulators for which they are certified. Vent limiters must only be installed directly into the vent connection of the regulator without intermediate pipe or fittings.

**ILPlumber** · 11-06-2009, 07:45 PM

Quote:

Originally Posted by TheMaster

If the oderant attacks the zinc and you use black iron do you pitch the line? What about rust? I've had to replace black iron here under a house because it was full of rust. We used copper and converted it to a 2lb system.

Yes, you do pitch the line. To a drip leg. Always.

TheMaster · 11-06-2009, 08:05 PM

Here on the 2lb systems NOBODY uses drips.

TheMaster · 11-06-2009, 08:08 PM

Quote:

Originally Posted by ILPlumber

Yes, you do pitch the line. To a drip leg. Always.

Il I'ma take some pic's of a 2lb gas system thats gonna blow your mind. Its terrible and I see it ALL the time. I will be going to this house at the end of the upcoming week. Its a spider web of 2lb gas piping with 3/8 od copper. The house is 8 years old.

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11-05-2009, 11:24 PM	#63
TheMaster Registered Member Join Date: Jun 2009 Posts: 6,437 My Photos	If the oderant attacks the zinc and you use black iron do you pitch the line? What about rust? I've had to replace black iron here under a house because it was full of rust. We used copper and converted it to a 2lb system.

11-06-2009, 08:05 PM	#68
TheMaster Registered Member Join Date: Jun 2009 Posts: 6,437 My Photos	Here on the 2lb systems NOBODY uses drips.