Silent and Failsafe Overflow System
- Thread starter JohnL
- Start date
Patrick Cox
Active member
I am setting up a Bean Animal in an external overflow box. My question is - do I need to glue my stand pipes into the slip bulkheads or can I just insert them without gluing?
Thanks
Thanks
Spar
New member
I did not glue them. Seems to be fine. the suction alone will jam it in well enough IMO/E, and by not gluing them makes it much easier to do maintenance later.
woodnaquanut
Active member
One inch will work.
Patrick Cox
Active member
Hi, I have a question on the siphon line. Should I have any concerns about starting the a siphon with vinyl tubing? My sump is setup for vinyl tubing to attach to the sump. So will vinyl tubing start a siphon as easily as PVC? Thanks.
Confused
Confused
Ok, so I have read a fair amount of this thread, but the more I read the more confused I get and frustrated. I have tried looking at other flow calculators and can't understand them either. Basically I want to know if my pump (Jecod dcs 9000) will create a full siphon using 1 1/4" (32mm) pipework and bulkheads at a head height of approx 5ft. It should flow about 6200L/h (1630gph) at this height.
Any help regarding this would be very much appreciated.
Confused
Ok, so I have read a fair amount of this thread, but the more I read the more confused I get and frustrated. I have tried looking at other flow calculators and can't understand them either. Basically I want to know if my pump (Jecod dcs 9000) will create a full siphon using 1 1/4" (32mm) pipework and bulkheads at a head height of approx 5ft. It should flow about 6200L/h (1630gph) at this height.
Any help regarding this would be very much appreciated.
Spar
New member
any issues with having a fully opened ball valve at the start (near the top) of the full siphon drain? I am about to move my gate valve down lower, but would like to have a ball valve up there for the infrequent maintenance I may or may not do on it (i.e. just for the hell of it).
ClownsRCoo
New member
Can someone show me a picture of a bean animal system that enters from the bottom of an external overflow instead of the back like the original setup on this thread? I'm trying to get a parts list of what I'll need to make this for my new tank.
Floyd R Turbo
Either busy or sleeping
Scroll back in this thread a few pages and you're bound to find one. There are literally hundreds of pictures of that type of setup in this thread. I'm assuming that you are talking about one like the ghost or synergy reef or exotic marine systems
Patrick Cox
Active member
sleepydoc
Team RC
Not exactly sure what your question is. There are two potential problems in creating a siphon. If the pump is not big enough, it will never pump enough to create a siphon. This is negated by the gate valve in Bean's design (except in circumstances where flow is too low to purge the air.) The other problem would be if the pump is too large for the drain, exceeding the capacity even when the gate valve is fully open.
The theoretical flow for a full siphon through 1.25" PVC pipe is approximately 5000 gph, well in excess of the DCS 9000's capacity, so you should be fine.
sleepydoc
Team RC
No. Bean used the (sanitary) Tee's with threaded caps to allow for cleaning. The tee also makes it easier to add the air line to the open channel pipe. Many people have used straight 90º elbows.
sleepydoc
Team RC
The only problem I can think of is that vinyl tubing is compressible, so for a large drop, the negative pressure may cause it to collapse, but with the gate valve that shouldn't be an issue.
Another potential drawback of vinyl tubing is that it allows algae to grow. I'm still not clear why you need the vinyl tubing over PVC. I would probably run PVC down to the sump and connect with a short piece of vinyl if It was required.
ClownsRCoo
New member
I am going with the (2) 90* elbow route and wanted to know is there a minimum height these should be so that the downturned elbow will be a minimum distance from the bottom of my external overflow bottom?
Also are each of the drains different heights?
Also are each of the drains different heights?
JaySchulz
New member
Looking for a second opinion here.
Tank is gonna 375 gallons. Im looking for 6-7x flow through the sump which is 2,250-2,625gph. I was planning on (3) 1.5" bulkheads to handle that flow. Now I'm second guessing myself and wondering if I should go with a bigger diameter bulkhead (1.75" maybe). What do you think?
Note: Im planning on using a Ecotech Vectra L1 (3100gph max) with 1.5" returns.
Tank is gonna 375 gallons. Im looking for 6-7x flow through the sump which is 2,250-2,625gph. I was planning on (3) 1.5" bulkheads to handle that flow. Now I'm second guessing myself and wondering if I should go with a bigger diameter bulkhead (1.75" maybe). What do you think?
Note: Im planning on using a Ecotech Vectra L1 (3100gph max) with 1.5" returns.
sleepydoc
Team RC
1.5" should be more than adequate for your purposes. The theoretical flow of a 1.5" pipe with a 36" drop is over 4000 gph. In his original description, bean used 1" bulkheads with 1.5" pipe and achieved 2000 gph (he didn't mention how high it could go, it likely could handle a fair amount more)
sleepydoc
Team RC
I'm assuming you're talking about clearance of the opening above the bottom of the overflow box. That depends somewhat on the flow you're looking for, but in general, ¾" should be adequate.
ClownsRCoo
New member
Yes, that's what I am asking about. I have 1.5" drains and will run a Vectra L1 and would like to not limit myself flow wise. I have a cover for my overflow though and would still like to use it so I need my plumbing to not stick up that high.
One more question: how much higher does the open channel need to be from the full siphon drain?
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