How do you like the Eshopps Eclipse overflow? Is it really quiet? I bought one for a tank and I'm concerned that it may be too noisy so I haven't drilled the tank yet. Glad to have found your build so I can actually ask someone who's using one. What's your experience with the noise level? Can you also tell me how high up the water is above the bottom of the teeths so I can judge how high to install the overflow and What is the size of your return pump in gallons/hr. There is very little reviews on this overflow. Thx
I've been happy with the overflow and I would buy it again for this sized tank up to maybe 90gals. At >= 100gal I would upgrade to a larger eshopps eclipse (3x 1" drains w/ 2x 1.5" internal bulkheads for a bean animal style).
The build quality is excellent and it's well designed. I run a Herbie style drain with 1" tuned siphon and 1" open standpipe emergency drain. It's almost completely quiet.
My only gripe is the 1.5" main bulkhead - this should probably be a 1" bulkhead instead, unless you run really high flow. When you run low volume through the overflow, the internal overflow fills without splashing, but the external portion may not be filled to capacity which causes splashing/gurgling at the 1.5" overflow transition point.
I've worked around this easily enough by restricting the flow using a smaller diameter insert in the 1.5" overflow and a 45" elbow to help redirect flow away from my open siphon drain to prevent air being subsumed directly (elbow redirects to the other side of the drain, where it swirls around the emergency standpipe vs. around the open bulkhead for the siphon, which can create turbulence/vortex and suck air more easily).
When you're plumbing it, as always with hard-plumbing you want to ensure your lines are straight and there is no lateral pressure on the overflow drain bulkheads. One of the other folks in my local club with this overflow had trouble getting his bulkheads to seal cleanly because his plumbing from the drains had a slight angle to it, which prevented a clean seal. With a more traditional in-tank overflow, you're working with wholes in the glass which may present a more firm target.
So, overall would do it again and I recommend it. My nitpicks and work-arounds detailed above.
I re-plumbed the overflow/drains using all hard-PVC to increase flow, durability, and introduce more PVC unions to allow disassembly/maintenance. Note, 1" unions added just below drain bulkheads and just above drain holes in sump. I used 90 deg elbows because 45 degree plumbing wouldn't fit in the small lateral space to do a 180 deg transition from back drain to sump under display.
I switched to a simple ball-valve for full-siphon control from a gate-valve, but mostly due to time pressure and lack of parts. Gate valve strongly recommended for fine-tuning of your siphon to get it totally silent, though I've made due with the ball-valve just fine.
I also dropped to a single hard-plumbed 3/4" return line/nozzle instead of two, but with the extra flow of hard plumbing vs. flexible tubing it's more than enough:




