Splitting one zone pump into two zones

Need some engineering and design help from the pros out there.

I have a well-mcclain wtgo-4 without a tankless coil. I have three zone pumps. One for a well-mcclain Indirect and two pumps for heating. I have a 2800 square foot split level ranch style house. With a unheated garage. All three taco 007-f5 pumps are controlled by the taco 503 box.

Zone 1 is 74 feet of baseboard and the pipe loop is 125 feet of 3/4 copper with a taco 007-f5 pump

Zone 2 is 52 feet of baseboard and the pipe loop is 90 feet of 3/4 copper through a concrete slab. With a taco 007-f5 pump


Zone 3 is the 29 gallon indirect with 18feet of 1 inch copper. With a taco 007-f5 pump.

Zone 1 is the longest loop and does three bedrooms, the bathroom, the living room the dinning room and the front entrance.

I have access to split this loop into two loops. The question is what would be the best way to do this.

I have come up with a few options that I thought would work.

Option one would be to disconnect the last pump on the manifold and add a tee and add a fourth pump to the manifold.

Option two would be to add 2 zone valve's to zone 1 pump and wire a new controller up to work with that setup.

Option three would be two remove the two heating pumps and install a pump with zone valve's for the heating zones and leave the other pump just for the indirect.

Option 4 would be to remove all three pumps. Install on pump and zone valve's with a new controller for the three heating zones and the indirect water heater.

If you have any other ideas I will gladly appreciate it. Just trying to do this right the first time.

Not sure if I would need a bypass for any of those setups as I don't currently have one. The plumbing and electrical is not a problem but the design, engineering and experience from the people that do it every day would be awesome. My end goal would be to eventually have each bedroom on it's own zone but that probably won't happen for a long time.

Thank you in advance.