Tankless Water Heater - Question

The Townhome was built in 2013 …
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Is the Tankless Water heater missing a …


Heat Collar ?

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Yes, it’s also missing the proper clearance, thus your confusion.

Are you sure? It looks like a vent termination kit to me that is just missing vanity plate.

The actual vent pipe is like 3 inches, the rest is the thimble/heat shield.

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Thanks , I will call it out

Missing escutcheon ring, the flue should be pitched to allow for condensate disposal (or a condensate line installed) on similar Rinnai units. Check that units specific installation instructions for installation requirements.
Here is an example:
Rinnai V94i-Value Series Installation and Operation Manual.pdf (3.5 MB)

EDIT My bad it is a Rheem. I don’t have a Rheem tankless manual in my files. Same advice different manufacturer.

Generic Info:

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Here’s the part.

That install is missing those cover plates.

https://parts.rheem.com/product/RPD-RTG20210-1?srsltid=AfmBOoow7_RacTB-zavAuK0Zr_KxE-tx0uZy1xbZQFM5_HPKnUxM75qv

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So basically a nothing burger

Should that electrical cord be hanging on the gas line

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Is that a GFCI outlet the WH is plugged into? Rheem does not approve of being serviced by a GFCI or AFCI controlled circuit.

Rheem requires a drip pan under their water heaters when installed in a way that leakage can damage building materials and one is missing.

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Sloppy work and I would note it. Also gas lines are not to be used to support anything, including a power cord.

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Just as an addendum. The item for sale(see link above) shows two trim plates.

The install pdf shows only the outside trim plate, not the interior plate, which means maybe it’s installed exactly as it should be.

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My understanding is that the concentric vent outer sleeve is intake, and the inner pipe is exhaust. Therefore, the clearance from combustibles is likely intrinsic.

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Shhhh, I’m enjoying the comments.

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Lol, well, I’ve installed boilers with concentric pipes but never a Rheem and never a tankless like that. It didn’t look all that shady to me, but one sorta expects to see a thimble trim plate of some sort on the inside, or at least something to trim out the hole, like fire foam or something.

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I’m sure there was a metal escutcheon in the kit, but it never got installed.

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Thanks for the info