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#1
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![]() I'm going to re-plumb my tank after many years. I wanted to know people's experience with unions.
So far I have only had unions on drain lines which are over the sump, in case of a leak it would drip into the sump. None have leaked though. I am looking at adding a couple of unions to the return line for ease of access, and these would be in the back of the tank. A leak would be a minor disaster. Just wondering if people have experience on leaking or non-leaking of return lines which are under pressure.
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120 gallon sps/anemones/LPS reef since 2004 Apex controller 8 x 54 watt T5 PowerModule Herbie's silent overflow system Jebao DC 12000 return pump Jecod CP-40 Cross-flow circulation device Mini Bubble King 180 Barr Aquatics calcium reactor Bucket fuge |
#2
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![]() I have unions on return lines without issue.
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#3
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![]() Same here, always have unions on returns and never an issue. I use an o ring grease to make sure they don't dry out and seal tight.
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Feed the bear goodies, make a new friend, don't feed the bear............... 8' - 165gal Reef DIY LED's Build 2012 Nano Contest Winner Febuary 2013 POTM Winner 300 gal + 60 gal Complete DIY Build |
#4
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![]() Thanks, will do it.
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120 gallon sps/anemones/LPS reef since 2004 Apex controller 8 x 54 watt T5 PowerModule Herbie's silent overflow system Jebao DC 12000 return pump Jecod CP-40 Cross-flow circulation device Mini Bubble King 180 Barr Aquatics calcium reactor Bucket fuge |
#5
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![]() With correct primer and glue you shouldn't have any problems at all.
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#6
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![]() Some have a flashing of plastic on the non-o-ring side of the union left over from the molding process... I use some 600 grit then 1500 grit sand paper to smooth it down. Saves the o-ring from distress.
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Single System Setup: 210G SPS reef, 225G FOWLR, 72G water change, 50G frag, 120G sump. I promise a journal at some point! (anyone need some coral frags? I likely always have stuff that is frag-ready) |
#7
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![]() Quote:
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Hey! I never "LEFT" the hobby, just doing fresh water now. Which is still listed as part of Canreef if I'm not mistaken. ![]() |
#8
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![]() O-rings will deform. No problem leaking if left alone but if in a few years you take things apart might nice to have new ones available for when you re-assemble.
Last time cleaned CL pump noticed them rather flat, not leaking but took measurements to have next time.
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my tank |
#9
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![]() That's how I tightened one a long time ago and I broke the bond where it was glued on. But I did'nt use primer. As for the o-ring seal i've never had a problem. It's actually a good idea to use unions on external return pumps in case your pump or pump seal goes, much easier than having to cut your plumbing.
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#10
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![]() its always a good plan to use unions around the wear items on your plumbing ie pumps, check valves, wave devices. It makes maintenance possible without having to dismantle your plumbing.
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