 Modified Durso for CPR Overflow
Hey everyone,
Just wanted to show some pics of a modification I've come up with for a Durso-inspired standpipe in a CPR overflow. I tried this design first: http://home.att.net/~rstockman/overflow.htm
However, there was too much turbulence created as the water flowed through the holes. I then tried the square notch in the standpipe in place of the holes, but this was no better for me. I had turbulence and, hence, loud noise.
I tried to come up with a way to create more laminar flow down the pipe. I thought why not just put another tube in there to break up the turbulence.
I toyed with some flexible tubing at first but then discovered CPVC. I use 5/8" CPVC tube inside the 1" PVC standpipe. I reamed a hole in the original PVC cap large enough to accept the CPVC, then capped the CPVC with the appropriate cap with some holes drilled in it.
There's some pics below.
I have a 600gph CPR overflow matched with a ViaAqua 3600 pump in the sump. I guess we're probably getting 400-500gph of flow, and this standpipe has handled this nicely.
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72 gallon bow, 20 gallon sump/refugium, CSL 4x65 PC w/ moonlights, CPR 600gph overflow w/ compact Durso, Turboflotor 1000 Multi, Via Aqua 3600 pump, multiple powerheads, custom outflow, Wavemaker timer. 160lbs LR, 95lbs live sand, 4 green chromis, 2 ocellaris clowns, algae blenny, shrooms, zooanthids, toadstool leather, finger leather, 2 skunk cleaners, 4 peppermint shrimp, 4 serpent stars, 3 cukes, assorted hermits, snails, and procelain crabs everywhere&&&&12 gallon nano-cube, 25 lbs live sand, 10 lbs live rock, ricordia mushroom, black-capped basslet, assorted hermits and snails
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