fed up

mikea23

If you have some much pull with the building dept why dont you tell them to do there job and we wont have this problem. The last thing we need is more codes. We will always have some in this industry that cut corners.

Kal Row

I’ve had it with people using foam core instead ....

I’ve had it with people using foam core instead of solid schedule 40 for pvc vented heating appliances!!!

Have this house, that someone vented 90+ furnace to the outside with 30ft of foam core pvc, and it heat bowed and opened up – and lucky for the owner, they had a carbon monoxide detector that went off!!!

Don’t get me wrong, if it’s outside, and going vertical, I don’t care if they use dryer duct, but in the house especially in confined spaces it’s a killer!!!

The ac guy on one of my Lochinvar jobs did that, and I made them rip it all out, and start over!!!

I have a connection in the NYC building DPT, and I can get them to change the code to require CPVC on the discharge side – that stuff, doesn’t come in foam core, as far as I know, – and the gray color will be easy for inspectors to spot, and WILL save lives

can someone to give me a good reason why I should shut up!!!

To paraphrase from the movie top gun, “I’m pissed and I want butts!!!”

hb_8

So why not............

......... just remove it, replace it and make the money? Someone is going to. Are you sure you want to be the HVAC cop?

Kal Row

because i see so much of it out there...

it's a killer waiting to happen, i cant get to all of them, and there isn't any real money in it anyway, i dont have time for nonsense, i focus on large "green" systems these days!!!

bob young

bold statement

you have the juice to direct code change------that is heavy duty power. i have trouble even getting a question answered. go for it. the new york boiler code is getting pretty strict these days but mostly enforced on commercial work but metal pipe should be specified not pvc. just one man's opinion. best of luck sounds like something that should definitely be addressed.

Kal Row

not so fast...

it can hurt a lot of people, - remember even when making domestic hot water the flue should only be 169f - so metal is not only not needed, it could be worse as it has a greater potential, of transfering heat to it's suroundings

maybe the manufactures shuld just tape a sticker over the flue that lookes like the attached jpg - and make it more multilingual than i have it

Paul Pollets

PVC venting

I suspect that the use of PVC for venting flue gases will be short lived. Viessmann already specs CPVC made by IPEX, as it is the only UL listed pipe. It's pricey,at over $20. a lineal foot, but who wants liability with the vent material?

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Paul Pollets

PVC venting

fast click

eluv8

Pvc Venting

Some boiler manufactures are starting to include in their programing protection for pvc venting. You tell the boiler what venting material you are using and it uses the flue sensor as a high limit control to avoid exceeding the temperature rating of the venting material used. Seems like a really good idea.

Kal Row

some of the lochinvar knight's derate themselves...

by slowing down the fan speed and thus the venturi gas-flow as the flue temp gets too hot until 240 at which point, all models cut the gas and purge – but, 240 of course, is way to hot for cellular foam core pvc, at that temp, it changes shape, bubbles, and blisters.

i really want to do this without getting the government involved - the DMV or even the typical building dpt, is proof that the government cant make things better - getting them involved is my last resort - it’s only under consideration because carbon monoxide is a real killer and I wont forgive myself if someone dies because I kept my mouth shut

Canuck_3

IPEX

Here in Canada - we've been mandated by gas regulations to only use "IPEX System 636" as plastic venting. It comes as PVC and CPVC, depending on the temp of the flue gas. I guess there were too many issues and close calls from installers, homeowners and brothers-in-law using ABS, SDR, poly tube, with solvent, contact cement, silicone, gum.

Kal Row

i m glad i paused...

cpvc is almost as expensive as stainless, but the biggest problem is, that it's not used for drains, thus those large sweep elbows are not readily avail and the tight elbows are no good for flues - so i am going to press for the multilingual sticker, and it has to say 260psi/and the metric equiv, so it's less likely they will use the low pressure cellular

Kal Row

your right, working on it...

each inspector has their own pet peeve, but most of them are out of date, and out of knowledge, there is one in Brooklyn, that measures the distance between the supply and discharge locations on pcv vented boilers and if it's off by one inch according to the manual, he fails the job, yet the very same job, had a long unbraced and improperly pitched horizontal run of cellular pvc and he said nothing about that, this kind of nonsense is not helpful at all!!! - clearly they need training, not new codes!!!

Kal Row

ps: lochinvar does put on a warning..see attached jpg