This item has a neat opening. Apparently it relieves pressure by releasing water through an orifice. Totally unsuitable for use in car parks as the administration does not want water to leak out during use. I installed it and it immediately started spewing water.
12V DC Electric Trailer Jack - 2000Lb Lift Capacity With Hard-Wire Connection
12 Review
Lippert Solid Stance RV Step Stabilizer Kit For 5Th Wheels, Travel Trailers And Motorhomes
20 Review
Kohree RV Door Window Shade For Sun Protection And Privacy In Camper Trailers And Motorhomes
25 Review
Keep Your RV Clean And Safe With LATCH.IT RV Step Covers - 3 Pack, 22" Wide, Best Fits 8-11" Deep RV Stairs - Protect Your Radius Steps Today!
21 Review