I’m having a system installed in a few days and I have drain tile on the interior running to daylight with no sump pit. If I need to install a check valve at the temination point, won’t the swing check freeze shut in the winter? I thought about drilling a small weep hole in the check and maybe in the pipe in front of the check to keep it dry,but the weep holes will probably freeze over in a slow drip situation. Has anyone had any experience in this area? Contractors in my area have no expiereance with tile running to daylight.