Do you mind elaborating?
Ok, sure. You're running both UVs off a single return pump which means comparable flow rates through both, but with different UV sizes and wattage you'll be getting different levels of radiation exposure - unless you adjust the flow to accommodate the least powerful UV.
They're both 40 watt uv sterilizers; one from aqua uv and the other from pentair. They do differ in size and recommended flow rates. That's why I have a gate valve before the Input and a flow sensor on the output of each sterilizer. I don't see how this is any different than having a manifold off of a return line. Further, I'm using a Jebao 18000 which is a dc pump capable of up to 4,752 Gph to accommodate all of the lost flow due to all of the fittings I used. The only issue may be the quality and reliability of the Jebao pump. I believe that with this design, I could run one sterilizer at 500 gph and the other at 1500. This is not my plan but I do think that it would be functionally possible.
Yes. Both UVs come with unions built into the body. All I have to do is shut off each of the valves and unscrew the unions. I simply didn't have the vertical space to be able to change the bulbs while it is still connected.
www.bulkreefsupply.com
Do you have a drain installed near the lowest point to drain the lines before you disconnect the UV? Or the room under each UV for a 2.5 or 5 gallon bucket to catch all the water as you disconnect the bottom union?
I really like that idea. Just not sure where I would put that drain. If you could look at the setup and recommend a location, I'd appreciate it.
So there was really no room for a shut off valve so I ended up putting one on the output of the return bulkhead in between the wall. I could access it through that tiny space between the tank and wall. (Refer to the second picture for reference.) It's almost impossible to get a picture of the actual valve
