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Featured twin pipe system part 2 (Mods to the twin standpipe)

Discussion in 'Tank Mods & DIY' started by Neil, Feb 19, 2011.

  1. justin2008

    justin2008 Registered

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    Thanks Neil,
    Think I know exactly what you mean, so from the tee under the main tank have a 32mm reducer(and 25mm reducer on the other end of the tee for the back up pipe) and add the 32mm ball valve(to get correct height for the 25mm pipe in 50mm pipe in wier) but why reduce to 32mm? Just when I think Ive got the logic figured out, Im lost again haha
    Hope I havn't lost you in all my babble!
     
  2. BillyLongPocketsShortArms

    BillyLongPocketsShortArms Registered

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    Sounds like the same set up i have if you have a look at my thread mate,
     
  3. justin2008

    justin2008 Registered

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    Cheers mate, Ill check it out now!
     
  4. BillyLongPocketsShortArms

    BillyLongPocketsShortArms Registered

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    If your in Carlisle sometime dive round and have a look if you want. I run a sicce multi 4000 and it puts out over 2500lph at head. The set up handles it no problems at all. I might even have a few spare bits of pipe etc kicking about
     
  5. justin2008

    justin2008 Registered

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    Cracking tank Billy!! Your pipework is different as I don't want(due to space and where holes are already drilled) the extra 25mm back up pipe, Im hoping to only use the 50mm pipe with a 25mm pipe inside, if that makes sense.
     
  6. BillyLongPocketsShortArms

    BillyLongPocketsShortArms Registered

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    Should be fine. Ive 20mm down the inside of the 50mm. Put a threaded connector on the bottom of the T just incase i get a blockage. There a bit noisy when the tall pipes take all the flow tho!!
     
  7. justin2008

    justin2008 Registered

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    Right so...(long day plus a few drinks doesn't help) not that youv'e probably tried it but if your 'extra back up pipe(25mm?) is not in action everything would run sweet as a nut.
    It would only become noisey if your main lower pipe(50mm) were to become blocked and your entire flow of 4000lph would be going down a single 20mm pipe?
    If thats the case then brilliant Ill go ahead, just as I need to strip my tank cut wier out and all pipework I want to be pretty sure it all be ok.

    No plans to be in your neck of the woods soon, but next time Ill give you a bell, Ill dump some purple mushies your way haha
     
  8. Neil

    Neil Registered

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    two reasons to reduce down

    first is that the 32mm valve will give better control of the flow then a 50mm valve
    second it will work out cheaper as well
     
  9. BillyLongPocketsShortArms

    BillyLongPocketsShortArms Registered

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    Im only getting 2500lph flow thru the standpipe after headloss from pump. Its the ammount of air getting sucked in that causes all the noise. The 20mm pipe will NOT cope on its own. But the 25mm back up one will on its own.
     
  10. justin2008

    justin2008 Registered

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    Thanks Neil, fully understand those reasons.

    Cheers Billy, thats some head loss. But 25mm pipe taking 2500lph works for me.
    Thanks very much both!!!
     
  11. asim2746

    asim2746 Registered

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  12. asim2746

    asim2746 Registered

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    what about this Neil.. I dont think you will see the picture in my pm.
     

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  13. Neil

    Neil Registered

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    Yes it will work great (as this is how I have mine)

    you will need two control valves
     
  14. asim2746

    asim2746 Registered

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    So I'm not sure if you remember the size of pipes Im using but.. its just normail white 22mm pipes the in let is 19mm soo will this be good or bad?
     
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