By adding all the unions and valves you are adding more head loss. Another thought, you could go with vinyl tube in place of spa or hard PVC. I use it with no issues. At least that would get you started while you wait for the spa flax to arrive. No sense in plumbing under tank if what you really want is in basement.
Is Spa Flex something I can buy at HD or Lowes? Or is this only sold at Pool stores? Are they durable over time?
Is this a brand new tank or a tank that is already set up? I ask because the bulkheads that come with the deep blue tanks are "barbed" for use with vinyl or poly pipe. If you want to hard plumb the system you will need to replace them with slip x slip bulkheads. Wouldn't be a bad idea to replace them anyway, the ones the tank come with are pretty cheap. I have seen more than one break.
It might be a drive for you, but my system is plumbed to the basement here in Point Pleasant and you are more than welcome to see it. Ethan from AO did the plumbing and used the flex pvc. It makes life 100 times easier with plumbing, and I believe he ordered it online.
Since you are going into the basement, use a bigger sump if you have the room. Once of the bonues of going into the basement is you have the room for equipment. I have a 120g as a sump, an 80g frag tank, a 60g recirc tank (how I do my water changes) and of course my big external skimmer.
What sort of equipment are you looking at?
By adding all the unions and valves you are adding more head loss. Another thought, you could go with vinyl tube in place of spa or hard PVC. I use it with no issues. At least that would get you started while you wait for the spa flax to arrive. No sense in plumbing under tank if what you really want is in basement.
If you have a pump strong enough, really doesn't affect it that much. I would rather have the options with double union ball valves, than not being able to change anything later down the line. Granted a bigger investment is needed in the pump, but well worth it since you can throttle back.
Vinyl could work, just depends on what he is trying to do/his needs.
I have orderd new Bulk Heads slip x slip. So that should work out. Definitely will check out the place on Chimney Rock Rd.. that is like 10 min. from my house.