Just got hard tubing and fittings from aliexpress. My fittings and tubing are 10mmx14mm and the fittings are push-in fittings. When I put the tubing into the fitting, it goes in easily and doesn't fall out when I shake the tubing, but if I pull on the tubing it comes out. Is this normal?
Product links https://www.aliexpress.com/item/OD-...ml?spm=a2g0o.cart.99999999.259.3da33c00ftcYgM
https://www.aliexpress.com/item/14m...ml?spm=a2g0o.cart.99999999.265.3da33c00ftcYgM
Product links https://www.aliexpress.com/item/OD-...ml?spm=a2g0o.cart.99999999.259.3da33c00ftcYgM
https://www.aliexpress.com/item/14m...ml?spm=a2g0o.cart.99999999.265.3da33c00ftcYgM