Severe leak in our camper! 2021 Northpoint

[Jdoss200]

I have 22 NP amd sink is leaking, slide is a sagging, among other issues. Very frustrated. It’s the blue cold water hoses. The attachment I’m assuming doesn’t have a seal. I can’t see it when it happens though. I will sit under there w water running and never see it happen

[JFlightRisk]

Our TT is 10 years older, but we do have cone washers on all the lines that connect to faucets. I did have to buy a few from our local RV dealer as none of the ones at the hardware store were close enough to seal correctly.

I replaced both sink faucets with better ones, and if I wasn't very careful re-attaching the lines, the cone seals would deform just enough to drip. I now carry a pair of spares.