Damaged water pump intake strainer cup.

I've never had that happen in 20+ years of having TT's and now a motorhome. Could have cracked over last winter due to residual water, and became worse over the summer's use ? Don't know. But, a cheap and easy fix....I'd just check it on occasion.

The white layer looks like paint.

I could always see the pink in it when I winterize but don't pay any attention to it in the spring.
Yes, It's an cheap and easy fix. May have to get a spare in case it happens again. The white is a mystery, it looks like I painted it.

I had one fog up badly, I blamed it on the bleach used for sanitizing.

Not an expensive item to replace. Any RV dealer CW some hardwares.

Lynnmor wrote:
I had one fog up badly, I blamed it on the bleach used for sanitizing.

I thought about that too. Didn't have any problem for 9 years now all of a sudden boom. I know I could see pink in it last fall.
I have only cleaned that screen a couple of times since we got it so it's not something I pay any real attention to.

Lynnmor wrote:
I had one fog up badly, I blamed it on the bleach used for sanitizing.

Been using bleach for 30 years and haven't had that - maybe calcium/crud in the water. Just a guess.

Nice that you caught it before it came apart and leaked all over.
Or left you high and dry..

I had a Shurflo pump strainer the turned white and cracked like that. It could be some of the bleach concentration was too strong when it passed through the strainer. I know when mixing insecticide for spraying my gardens in the past, malathion that I used for Aphid control on the sweet corn and sometimes on tomatoes would turn clear Plastics white when I mixed it. It even melted a plastic 1 oz measuring cup used for measuring liquid medicine.

It softened and turned the clear vinyl dip tube on the Ryobi 18-volt electric sprayer I bought a couple years ago white. I used malathion in the sprayer on a huge nest of yellow jackets in the ground along with some yellow and brown wasps that had built paper nests around the yard.

mleekamp wrote:
I've never had that happen in 20+ years of having TT's and now a motorhome. Could have cracked over last winter due to residual water, and became worse over the summer's use ? Don't know. But, a cheap and easy fix....I'd just check it on occasion.

This would be my guess as well. I had one freeze and crack once when some residual water damaged it. It turned white just like the OP's picture shows.