Finding a Low-Profile Replacement for 400mm Dometic Mini Heki Skylight

[bigfatguy1]

Sprinter 3500, skylight is in a 400mm square cutout (not the 14" or 18" square most other systems use). The plastic is failing and needs replacement.

Ideally, teh replacement would be very low profile so I can put it under a solar panel.

Any advice is appreciated.

 

[Rene T]

Take it to a dealer and have them do the work. Or better yet, maybe a mobile repair guy. They probably would be much cheaper than a dealer and probably do a better job than a 20 year old kid just out of diapers

 

[RNS1]

Icondirect, rvpartscountry, skylight depot were some that came up in search. 400mm is about 15.75in and 18in square is a standard size. I replaced mine over shower about 4 years ago and is going strong. THINK got mine from icon been awhile.

 

[bigfatguy1]

I plan to do the work myself, I just need to find the part.

My biggest issue is: I'd really like to avoid cutting metal, so the fact that Dometic is the only mfg working with a 400mm cutout is really making this tougher than it should be.

 

[darsben]

Take it to a dealer and have them do the work. Or better yet, maybe a mobile repair guy. They probably would be much cheaper than a dealer and probably do a better job than a 20 year old kid just out of diapers

I resent the concept that a 20 year old is just out of diapers. Most 20 year olds know everything!

 

[Rene T]

I would say that 1% of 20 year olds don’t know everything and the rest are working at dealerships.

 

[Gary RV_Wizard]

400mm x 400mm is a common size in Europe, but may be harder to find in the USA. Google that size and see what you can find.

Google Search

The US RV standard typical roof skylight opening is about 16"x16", so that may be a substitute. 400mm is just a hair smaller at 15-3/4". A 16x16 dome neatly covers a 14x14 vent-a/c opening, so that may make it a bit more common than some other sizes.

Here's one: https://www.amazon.com/Sun-Tek-Mobile-Skylight-Double-Flashing/dp/B074VDDQC1/

 

[Rene T]

400mm x 400mm is a common size in Europe, but may be harder to find in the USA. Google that size and see what you can find.

Google Search

The US RV standard roof opening is 16"x16", so that may be a substitute. 400mm is just a hair smaller at 15-3/4".

Gary,I always thought the US RV standard was 14 1/4” X 14 1/4”

 

[Gary RV_Wizard]

Gary,I always thought the US RV standard was 14 1/4” X 14 1/4”

My bad. As you say, the standard opening used for a/c units and vents is indeed 14x14. The OP is talking about a dome skylight rather than those other openings, but my use of the word "standard" was misleading. And there really isn't much "standard" about skylight sizes either. I'll add a correction.

 

[Mark_K5LXP]

A couple years ago I replaced my failing shower skylight. Going by winnebago part number it was a non standard size and obsolete. It's not like any of this is precision or you'll use the same screw holes again. I just got the next size up standard replacement, used the right goop with stainless screws and check the box.

Mark B.
Albuquerque, NM