Go to a smaller size then the 1/2" like reduce it down or get a 1000gph at least. But I agree it sounds like the head pressure isn't enough for the lines you're using.
should have like a 7ft head on a 600gph pump, it's just not enough volume of water for his application. anything 1500gph to 3000gph is a good range and then you can put in a valve to get what you want. God i've had to buy so many sizes of pumps it's just better to oversize cuz you can use it later on something else.
It’s not a diaphragm pump. But I actually plan on using one of those for the self draining set up im building. I bought these expensive 15 each saucers for like $20 a pop x12. Made a hole and bought 12x $6 fittings for the drain. I originally had pvc pipes coming up and siliconed into the saucer but I could tell they would just pop off easily. So I forked put another $70 just for the little drain fittings lol
How many lights are you running?
4x 1000 is installed to the ceiling but I’ve been running 3.. 4 gets too hot but I’ll probably start running it ina week or so once I get enough saved to purchase 18-24k btu mini split
