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Dimensions of Fogatti InstaShower Ultra Trim Ring  

Published 10/01/2026

Question:

is the 18 x 18 measurement from outside to outside or is it the inside measurement

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Expert Reply:

Hey Linda!

I went out and measured the # FG77VR myself to make sure we had the dimensions right. The overall outside-to-outside measurement is 22-9/16", while the inside opening measures 16-1/32".

That means the trim itself is about 3-1/4" wide on each side. I’ve included an illustration below to help show where those measurements are taken, but just to clarify, the illustration is not an actual photo of the ring. I’ll include a real photo of the # FG77VR as well so you can compare it to what you have.

Is this being installed as a part of a Fogatti InstaShower Ultra water heater, or are you using it for something else?

expert reply by:
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Jerry B
real photo of FG77VR in hand
real photo of FG77VR in hand
(click to enlarge)
illustration of dimensions of FG77VR
illustration of dimensions of FG77VR
(click to enlarge)

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