My pump is not variable speed and hogs electricity like Tang and transfers. Would like to swap it out for a variable speed one with a timer. It looks like I could just disconnect fittings on both sides and swap them out, plug the new one in, set timer, and high five my wife. Is there anything else to worry about?
What pump should I buy? Pool is just under 20,000gal.
Most pumps do not simply line up with other pumps irt unions on the pump inlet and outlet unless the pump you currently have has a vs model you can swap it out with. So plumbing will probably be required.
Additionally, switching to a vs pump may require you to upgrade your electrical circuit supplying the pump. VS pumps generally are rated at higher amps than single speed pumps. You can program them to draw less electricity but the circuit has to be able to withhold the max amps that the equipment on it draws.
Send me pics of equipment, pump, motor rating plate on pump, and pool. We can point you in the right direction.
Sorry for taking so long to get back to this.
current pump is a Jandy FloPro 
Sent from my iPhone using Tapatalk
So Jandy makes that model of pump in a VS version.
https://www.jandy.com/en/products/pool-pumps/vs-flopro-1-hpIf you have Jandy automation then just buying the pump will suffice. Connecting the low boltage communication from the pump to the computer will allow you to program and operate the pump seamlessly. There are older Aqualink automation PCBs that do not support variable speed pumps but if the computer is recent and/or has the iAqualink phone controls it will.
If you have mechanical controls or a Pentair automation system (not sure about Hayward’s capabilities) then you will need to buy the accompanying mountable controller to program pump.
As far as plumbing, that pump will be a direct coupler swap-out. Meaning that you will only need a large pair of channel locks to swap out the pump on the plumbing.
As far as electrical, you will need a 20amp service for that pump. If that is what you currently have and no other equipment is on the circuit, you will be fine. If their is any other electrical equipment on that circuit and you have a 20amp then you will want to speak with your electrician on if your breaker/service meets your requirements.