In a garage on a slab need to get to a drain.

[GulfCoastGuy]

I'm setting up a saltwater mix station for a Marine Aquarium in my garage and I'm installing an RO/DI unit. The problem is my house is on a slab and there isn't a drain access in the garage. The Water Heater is in the garage so I do have access to a cold water line for my source. How do I get the RO/DI waste line to a drain.

If it helps I'll be keeping about 20 - 25 gallons on hand at any one time. Weekly water changes on the aquarium will be around 13 gallons. I estimate weekly waste to be around 45 -50 gallons. Waste lines from the system I have planed are 1/4" to 3/8" dia. tubing for Mur-Lok fitting.

Thanks in advance.

 

[Mr_David]

is the waste a drip discharge? you can try using a condensate pump. then from the pump you can run 3/8 copper to anywhere in the house. Laundry drain the best place.
I just installed an AC in an interior closet and ran almost 40 ft of tubing to my laundry drain in garage through the attic. varmints will chew thru plastic tube.