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Posted by Eigenvector on May 9, 2007, 9:07 pm
> My sister-in-law's new house has a basement guest room that backs onto
> the equipment room. The gas hot water heater (domestic + radiant
> heat) is located up against the wall that separates the two rooms.
> When the HW tank cycles, the vibration/noise is transmitted to the
> guestroom wall via the PEX hanging on the studwork and the supports
> for the copper pipes coming out of the top of the tank (also attached
> to the studwork - no drywall on the equipment room side of the
> wall)
>
> This makes a heck of a racket. I want to isolate the vibration from
> the partition wall as much as possible.
>
> a) do I have to stick with the J clamp mounts for the PEX or can I use
> something with some flex to it (loop of copper strapping, say)?
> b) how much support does the copper rat's nest on top of the HW heater
> need? With my home tank, the copper is tied to the tank by the
> fittings, then to the overhead joists. There is no intermediate
> support to the vertical wall.
>
> I'd post a picture if I could remember how/where to do it.
>
> Jurisdiction is Ontario in case there are any building code experts in
> the audience.
>
> Thanks,
> Chris
>
My hot water heater has PEX to it, I've never heard noise go through it.
As to supporting PEX, it shouldn't be taught or rigid, it needs to flex and
bend as it heats and cools. I don't support my PEX with J clamps - used to,
but I find that hoops work better
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