High temperature flexible coupling for water heater exhaust?


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Old 12-30-10, 05:18 PM
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High temperature flexible coupling for water heater exhaust?

hello!
Is it ok to break up a long run of PVC (being used to exhaust gas water heater fumes) and connect the two parts with a flexible rubber coupling? This is being considered to reduce the vibrations and noise through the PVC pipe? The vibrations are coming from the blower motor on the water heater (its brand new). We are exploring different options. The exhaust fume temperature is 180 deg. What flexible material couplings can handle these types of temperatures?

Thanks
 
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Old 12-30-10, 06:30 PM
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What model and make HWH? There usually is a rubber coupling at the top of the fan where the pvc starts. That alone should isolate vibration. I have installed some new HWH,s with faulty fans right out of the box. Noisy and loud. It should be under warranty and a tech should come out and look.

Also you have another post that says its your furnace.

Mike NJ
 
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Old 12-30-10, 08:46 PM
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Originally Posted by lawrosa View Post
Mike,

I am dealing with multiple issues - Furnace and water heater.

The water heater is BRADFORD WHITE M1TW50S6FBN. Its brand new - installed yesterday. The motor on top has been replaced. The new one vibrates equally. The installer has now suggested breaking the hard PVC pipe and putting in a rubber coupling. This way - hopefully - the vibrations will be contained. I guess the key question is how much vibration is normal?

Do you know of any site/forum focused on Bradford White.

Thanks
Vik
Could you tell me the model HWH and Furnace?
 
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Old 12-31-10, 03:10 AM
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The hot water heater is a BW M1TW50S6FBN.

(The problem is for hot water heater only. I made a mistake of confusing it with the furnace. Furnace exhaust works fine - no vibrations in exhaust pipes that are equally long and also made of hard PVC. Sorry for the confusion)
 
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Old 12-31-10, 10:15 AM
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1)Is it piped all 3" PVC or 2"?
2)How many elbows are on the line starting with the HWH to where it leaves the house?

And this is what your instructions note.

NOTE: Properly sized PVC, CPVC or ABS pipe must be used.

Mike NJ
 
 

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