Sequence Pumps
- Thread starter kevinpo
- Start date
Hi,
I have a 1.5hp and a 2hp sequence being used on my Koi pond. In the past 30 months, The longest a sequence pump has lasted is about 6 months before bearing or seal issues.
The pumps are quiet. These are above ground with the leaf basket, priming baskets. The priming system doesn't work worth squat.
The pumps are quiet and move a substantial amount of water. In this case they are moving fresh water, and they are outside. (They are rated for outdoor use). The weather proofing in the electrical box is really inadequate.
I guess you might think I have nothing good to say about these pumps. They are not perfect. But they are quiet. And sometimes that's what you have to put up with. In these size pumps from the other people I have spoken with they don't run forever.
The customer service at sequence is great. As soon as I spot a leak, or start to hear a bearing squeal, I call them, they send me a spare, and then I send them mine, and they fix it.
I don't think I would recommend a different pump. And if I built another pond I would stick with sequence just for the quietness of the pumps.
Dave
I have a 1.5hp and a 2hp sequence being used on my Koi pond. In the past 30 months, The longest a sequence pump has lasted is about 6 months before bearing or seal issues.
The pumps are quiet. These are above ground with the leaf basket, priming baskets. The priming system doesn't work worth squat.
The pumps are quiet and move a substantial amount of water. In this case they are moving fresh water, and they are outside. (They are rated for outdoor use). The weather proofing in the electrical box is really inadequate.
I guess you might think I have nothing good to say about these pumps. They are not perfect. But they are quiet. And sometimes that's what you have to put up with. In these size pumps from the other people I have spoken with they don't run forever.
The customer service at sequence is great. As soon as I spot a leak, or start to hear a bearing squeal, I call them, they send me a spare, and then I send them mine, and they fix it.
I don't think I would recommend a different pump. And if I built another pond I would stick with sequence just for the quietness of the pumps.
Dave
I think I will go with Iwaki.I worked at a maintenance company in North Dallas for several years and we used Sequence pumps for all big jobs. First off, they are the most energy efficient "large volume" pumps around. They are very quite for their size. Be sure to have them outfitted with saltwater safe seals and "o" rings. Also keep in mind that the "intake opening" diameter multiplied by 10 is the distance in inches you must plumb to the sump to keep the pump working properly for years to come. For example, if the intake of said pump is 2", then you must have a total of twenty inches from the pump to the bulkhead. I would use Sequence pumps on any big tank I ever set up. Best place to get them is Custom Aquatics. I hope this helps.
I work at the Houston Zoo. I run the 4,000 gallon coral exhibit there. Anyways, in answer to your question, the senior aquarist there (who has been there 22 years) Goerge Brandy, is very much into industrial equipment, of course, and he learned this bit of information from a pump manufacturer. It is something that most of us never run into because we have small pumps on our tanks. The dynamics of a large volume pump are, of course, not the same as a small pump. The length of the plumbing from the pump to the bulkhead on a larger diameter intake is important because (keep in mind I am not a physisist or engineer. I am but a mere zookeeper) the longer distance helps in the internal pressure of the pump somehow. It can also cut down on the tendency (elbow or no elbow on end of bulkhead in sump to discourage vortex) of the water to vortex into intake. blah blah blah yada yada yada. It is what I have been told by a guy that has been designing these things for over 2 decades. I hope that answered your question.
I have been using one as a basement return for a few months, and so far so good. They seem to have a pretty good rep, and I can't believe everybodies is having problems within 6 months as mentioned above. Mine is the smallest one and it moves a rediculous amount of water. Its fairly quiet, but I wouldn't want it in my bedroom.
- Location
- NC
I've been using the sequence 6000 model for my basement sump about a year now. I'm very happy with this purchase. When I was searching for a pump it had to handle head pressure, and I wanted an efficient low rpm pump. The sequence pump is the only one that offered this. I seen a post a while back and Brian at atlantisaquatics was using a sequence pump on one of his systems. I would email Brian and also customaquatic and get their opinions.
I've been thinking of buying the sequence model 2400 for a closed loop. It seems that too many people are having problems with the amp master- leaking, not restarting.
I've been thinking of buying the sequence model 2400 for a closed loop. It seems that too many people are having problems with the amp master- leaking, not restarting.
KEVINPO,
that is the minimum distance. The closer you get to the suction end, the greater the pressure. The length of the pipe will required will calm the turbulence and get all the water being drawn in going in the same direction, which is in to the suction end of the pump. Fluid dynamics.
that is the minimum distance. The closer you get to the suction end, the greater the pressure. The length of the pipe will required will calm the turbulence and get all the water being drawn in going in the same direction, which is in to the suction end of the pump. Fluid dynamics.
Sponsor Reefs
We're a FREE website, and we exist because of hobbyists like YOU who help us run this community.
Click here to sponsor $10:
