Installing a 21" deep fridge into a 19" space on a Trillium 4500 - Fiberglass RV

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Old 09-04-2011, 12:20 PM   #1
Senior Member
Name: Martin
Trailer: Trillium 4500 1977
Posts: 143
Installing a 21" deep fridge into a 19" space on a Trillium 4500

I had an original Dometic 211 3 way fridge into my Trillium 1977 that was in poor condition. The interior shell was broken in several places, the door seal was shut and the cooling system in questionnable condition. Looking for replacement unit made me aware of the following problems:

1- The only replacement units available are 3 inches deeper than the Dometic 211. Original unit is 19" deep, all replacement units need a 21" deep space to fit. The Trillium curved shell does not allow anything deeper than 19" and installing newer units protruding 3" from the cabinet would be very ugly and not practical.

2- The Norcold fridge gas line is on the right side, the Dometics on the left side. I found a used Norcold 323 in excellent condition, so I had to change the gas line side.

3- The potential replacement units are 1.5" narrower than the old unit


1- I did cut the outside fiberglass shell, installed a board shelf protruding 2" outside and rebuilt a shell to hold the original bottom vent out of aluminum.

2- I installed a wood frame inside the interior cabinet opening to make it level and 1 1/2" narrower on all sides and protruding only 1" indoor.

3- I cancelled the old gas line and routed it on the right side

4- I adapted the funnel shape fiberglass ventilation insulator, so heat is routed completely outside.

All I can say, it fits and it works just fine. Most people would think it is original, except when they open the fridge.

I prefer the Norcold unit because temperature is automatically regulated under 110V or 12V, as opposed to the Dometic 2193 which is the only other option that is now available in that small size.

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Old 09-04-2011, 01:46 PM   #2
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Name: Raz
Trailer: Trillium 2010
Posts: 3,555
Hello Martin. Most folks solve this problem by extending into the living area. I think I like your approach better. Very nice job. A while back someone suggested using an old shower surround (easily obtained) as a source for fiberglass sheeting. Might work in place of the lexan should others go this route. Thanks for sharing, Raz

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Old 09-04-2011, 04:38 PM   #3
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Name: jim
Trailer: 2016 2ndGen Escape19 Prairie Schooner pulled by 2014 Dodge Ram Hemi Sport
Posts: 6,239
Now if you repaint the blue line trim no one will ever know!!
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Old 09-04-2011, 08:24 PM   #4
Senior Member
Name: Martin
Trailer: Trillium 4500 1977
Posts: 143
Fridge upgrade on Trillium 1977

Originally Posted by cpaharley2008 View Post
Now if you repaint the blue line trim no one will ever know!!
This blue line is made of reflective tape (like road signs). Buying matching tape or paint may be an economical option the day I decide to strip and refinish the exterior (currently painted with Tremclad almond color).

I found a local vendor that sells Lexan sheets of all sizes cheaper than most vendors sell plexiglas (too brittle) or aluminum (too thin or too expensive). I used another sheet of 4mm lexan to replace the door window that had a broken piece of 5mm glass on the bottom. It is unlikely to ever break again !

Martin, Qc Canada
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Old 01-06-2012, 05:01 PM   #5
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Name: Mike
Trailer: 1977 13' Trillium
Posts: 401
It is threads like this that make this site a great one. Excellent job on the switch and explaining it!
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fridge, trillium

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