Return Pipes

Discussion in 'Beginner Discussions' started by Sentari, 28 Jul 2009.

  1. Sentari

    Sentari

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    Hi All

    I just need some info on return pipes.

    I'm currently thinking of making my return to my tank using 40mm PVC pipe. From the pump i will use 15mm clear flexible pipe into a converter that connects to the 40mm PVC pipe.

    A few questions around this :

    • Will my 1500l/h pump be okay for a 1200 x 450 x 450 tank
    • By using a think pipe would i have a problem with headloss etc
    • Should i use something different.
    Thanks!
     
    Last edited: 28 Jul 2009
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  3. chikaboo

    chikaboo

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    Hi Deon - I bought myself some 32 & 25mm clear pipes from MICA and sorted my plumbing out - ask them for the irrigation section - you will all connectors,elbows, joins, t-pieces there to fit the pipes you using with no need for conversions - what a pleasure to do the job - and yes thicker diameter piping with affect head loss but if you use a ball valve tap to control the flow back then you can achieve the maximum flow of your pump!
     
  4. Sentari

    Sentari Thread Starter

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    Thanks! Sorry its 40mm piping. I've been told it will be okay. So lets see. I dont want to go clear because of what it will look like with coraline etc. I just think its neater. Thanks for the advice!
     
  5. THE ANIMAL

    THE ANIMAL

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    Hi Sentari.
    First how many outleds are you plan on having on this pump and do you have any other pumps for circulation?
     
  6. inflames

    inflames

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    Hi Sentari,

    I personally use the clear flexable 20mm tubing and have a T piece at the top where the water enters the tank to split the flow. 1 right and 1 left. The reason used the flexable tubing is because when you add bends (60 degree or 90 degree) that is where the real head loss occurs. So my thinking is the less hectic the bend the better the flow and the lesser the headloss. If I had to use 30mm pvc piping it would look allot neater, but I would have to have 3 x 90 degree bends (possibly 4). I think that the head loss would be allot more than what I currently have and it does the same job...if not better! I have a return pump (which is actually one of my power heads from my DT as my pump packed up!) that is rated 2000ltr/hr. I would think that 1500ltr/hr pump would be fine...but if you add to many bends into the tubing you are going to loose flow! It may even take it down to an actual 1000ltr/h which I think is to little!

    Thats my opinion!
     
  7. Sentari

    Sentari Thread Starter

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    Just 1 return. I will have a seio wavemaker and 1 other powerhead.

    Thanks. I will have 2 bends. Once the return is over the top it wont matter. Maybe i should up the pump to a 2500l/h pump.
     
  8. Mekaeel

    Mekaeel Moderator MASA Contributor

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    Hi Sentari. Why are you using such thick piping for the return? I aswell as most other reefers use 25mm PVC pipe. At one stage I ran a 6500lph pump on a 25mm pipe and it worked fine.
     
  9. Sentari

    Sentari Thread Starter

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    The piping looked stable and been looking at most LFS at their returns and they seem to be quiet thick. Do you think i should rather go for 25mm PVC (Electrical) pipes rather?
     
  10. Tobes

    Tobes Retired Moderator

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    Yeah, agree with Mek - use 25mm for the return from pump and 32 - 40mm for the overflow pipe back to sump ;) - even two incase one blocks :p
     
  11. Sentari

    Sentari Thread Starter

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    Current my overflow box is done with 50mm. So i dont have a choice on changing that. Everything is done with my overflow. I will change te return to 25mm. Do you think that 1500l/h pump will be okay for my tank?
     
  12. Mekaeel

    Mekaeel Moderator MASA Contributor

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    Stick with 25mm pipes Sentari, it will be perfect. Visit an irrigation company like Astor, get you piping from there as those pipes are meant to handle pressure.
     
  13. Mekaeel

    Mekaeel Moderator MASA Contributor

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    A 50mm overflow is ideal! Yes 1500lph inc head loss is perfect as you dont want too much of flow though your sump as it will defeat the purpose of filteration through your skimmer, DSB etc....
     
    Sentari likes this.
  14. Sentari

    Sentari Thread Starter

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    Thanks Mekaeel. Going to construct the return plumbing this weekend. Will post pics on my Tank Thread! :) Now i understand why i didnt become a plumber...:razz:
     
  15. Mekaeel

    Mekaeel Moderator MASA Contributor

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    lol. Keep us posted, looking forward to the pics :)
     
  16. RiaanP

    RiaanP Moderator

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    If using clear flexible pipe, 20mm. check there are two types out there. One thin wall and one thick wall. Use the thick wall. Can handle more pressure and will not bend close and block like the thin wall one. Thich wall also excellent for koi ponds and fountains, because it does not bend close like the thin wall type.
    The inside diameter are the same.
     
  17. THE ANIMAL

    THE ANIMAL

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    Yes :iagree: all the way with Mek 50mm overflow:thumbup: 1500lph to a 2000lph perfect and I also use 20mm to 25mm pip return. 30MM and up you will need a larg pump for that and then like Mek said you will not get 100% out of your filteration.
     
  18. Sentari

    Sentari Thread Starter

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    Thanks Riaan. I have got the thick wall clear piping.

    100% Will be doing all the work this weekend.

    Thanks everyone!
     
  19. inflames

    inflames

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    All great advice here!!:thumbup:
     
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