It's alive! And bonus, my floors are dry. The whole thing is still turned around backwards so I can play with it.
Picked up a Sicce Syncra Silent 3.0 today, along with a bit of vinyl tubing and barb fittings. After boiling the tubing (literally - I boiled water in the spaghetti pot and put the tubing in the water for about a minute) to get it straightened out and round again, I was able to cut the correct length, held my breath, and plugged it in. We officially have water movement up and down in all the right places. I found one small section of plumbing that I somehow forgot to glue that started dripping, other than that I was able to geek out for a couple of hours tuning the overflow to get it quiet, doing some power off/on and blocked primary tests. Everything works as planned! Not brave enough to let it run unsupervised overnight yet, a longer test will come tomorrow while I do the laundry, housework and bide my time before the big Game of Thrones finale.
The specifics, with some how and why for anyone who might read this and wonder how it works:
Sicce Syncra 3.0 return pump, through a small section of vinyl tubing. Why the bit of tubing? Vibration dampening. I'm wondering if silicone tubing might do a better job of that though, because I still get a noticeable hum from the sump. Definitely less than if it were hard plumbed to the pump though. From there, it's up through a manifold for the frag tank and a reactor, and through a 3/4 wye check valve to the display. Why? To cut down on the back siphon and splashing when the return is turned off/on for feeding and maintenance. For the militant anti-check valve crowd: the check valve is NOT there as a safety measure, rather for the convenience of having less water moving around when the pumps stop. I still have to do some testing with the valve jammed open to see where my water levels go in the sump. I'm confident I have room to spare.
Once the water is in the display, it leaves through an Eshopps eclipse L. The max gph on the large size overflow is overkill for a 90, but it gives me the 3 drain bean setup which is the only way I would ever run a tank. The siphon line has a cone style strainer over it, and leads down to a gate valve. This is the first time I've used a gate valve instead of a ball in that position, and man what a difference it makes to tune things. An easy 1/8 to 1/4 turn to get things dialed in, instead of tapping and hoping and swearing at the clumsy and coarse ball valve tuning. The main and secondary plumbing both end a short distance below the water line to allow the siphon.
The secondary is easier to see in the photos, it's a street 90 inserted into a standard 90. Why? The street 90 saves about 3/4 of an inch which means I have room to wiggle the parts around to adjust things as opposed to two standard 90s butted together with a piece of PVC. There's one small hole drilled in the 90 at about the 45deg position, putting it right at the level of the dry emergency drain. This allows the secondary to go full siphon at the same time the emergency starts taking water, to make sure the level never climbs above the top of the emergency for more than a few seconds. If there's a block in the main, the whole thing starts making a heck of a lot of sucking and splashing noises as the secondary siphon starts and breaks, and the emergency dumps water directly into the skimmer chamber. Why the 90s at all? That keeps the trickle sound from the secondary under water, making it run silent.
All of that water, whichever drain it ends up taking, goes into a Fiji Cube 30" sump. Another first, I've only ever had an old 30 gallon DIY sump that I borrowed long term from my brother in law. It served it's purpose, and works fine, but I wanted the flow-over filter floss drains instead of socks and the refugium.
