How to stop slide topper from sagging?

[KATOOM]

I have two slides with toppers I recently changed. The smaller bedroom topper is always pretty tight and sheds water. But the larger living room topper always collects a water puddle in the middle which quickly turns into a brown oval. Ya cant see it when standing on the ground but its still bothers me that it wont shed water like the other slide. What can I do to help stop the water from collecting up there? Or is this just the nature of the slide topper?

[fj12ryder]

I think the smaller toppers stay snug for that very reason: they're smaller. The larger toppers would require so much tension to stay taut that it may create too much stress on its attachments.

That's my thought anyway since our large topper does the same as yours with the smaller toppers being just fine. But I'm like Dick_B: "However, when all is said and done I just let it pool and it runs off when I retract the slide. No need to carry any more `stuff' for a sometimes problem."

[Dick_B]

Ours also collects water. I've tried throwing a rope over the topper and affixing in on each end which tends to form a channel for the water to run off. However, I'm also concerned that this will stretch the cover which creates its own problems.
I really like the idea (mine) of a perforated pvc pipe just slightly longer than the width of the cover. The water flows into the pipe and out the end. See stretching note above.
However, when all is said and done I just let it pool and it runs off when I retract the slide. No need to carry any more `stuff' for a sometimes problem.

[Chris_Bryant]

If the topper roller tube is bowing, Dometic has a cradle kit which works well-

[K_Charles]

Does the water come off when you put the slide in? If it works why would you need to fix it?

[mguay]

Awning Air Wedge

[navegator]

I have seen some that have made an inverted "T" out of white PVC like a coat hanger used at a clothing store upside down for the lenght of the slide out.

navegator

[Prowler_Doug]

We put a large beach ball in the center of the slide topper. Water runs right off.