Advanced Custom Fields Plugin: Get file URL into Parent

Here’s how ACF keeps attachment data:

meta_id        post_id     meta_key        meta_value

971            931         doors           666
972            931         _doors          field_25

As you can see if you’re using get_post_meta it will only ever be able to return you an ID. Since not using get_field you’ll need to do the extra step of getting attachment metadata yourself:

$meta_one = get_post_meta($post->ID, 'doors', true);
$meta_url = wp_get_attachment_url( $meta_one );
echo $meta_url;