I have a second oil tank I would like to install and have it hooked into my first so both may be filled with the same fill pipe outside. I already have the first plumbed in place with a vent and a fill to the outside. It is an old tank with only two openings in the top - one for the fill and one for the vent. The new tank has four openings. How do I plumb them together so both may be filled from the single fill pipe outside? Do they both have to be at exactly the same level or should one be slightly lower or higher than the other?  Is a ball valve with a lever okay for the oil shutoff at the bottom of the tank or do I need something specific for the job?

 

This question has been responded to in your duplicate post in the Plumbing and Piping forum.