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DIY Cannister Filter :All Features of an Expensive Cannister
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Perikaruppan
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PostPosted: Sat Jul 14, 2007 11:06 pm Post subject: DIY Cannister Filter :All Features of an Expensive Cannister Reply with quote

 Hi  Friends...  after  a  long  time  of  testing  and  re-testing  i  finally  ended  up  with  a  working  cannister  filter  with  maximum  flexibility  and  as  economical  as  possible.  
 
 After  a  lotta  brainstorming  found  the  basic  method  in  which  the  cannister  works  is  the  best  method  i.e.,  was  is  siphoned  from  the  tank  to  the  bottom  of  the  cannister,  flows  upwards  thro  the  media  and  the  motor  at  the  top  pumps  its  into  the  tank.  The  same  was  achevied  here,  with  more  flexibility  with  regards  to  the  size,  motor  capacity  and  media  selection  and  mostly  the  LOWER  COST.
 
 
 This  is  how  the  construction  was  done:
 1.  a  4"  PVC  Pipe  of  1  feet  long  was  taken  as  the  container.  a  3/4"  hole  was  drilled  in  the  bottom  side  of  the  PVC  for  inlet  of  water  from  the  tank.  
 2.  The  Base  of  container  was  sealed  using  a  PVC  Sheet.
 3.  Got  a  4"  threaded  PVC  Cap  to  seal  the  top  of  the  container...  and  this  is  where  all  the  problem  rose  from...First  i  have  to  get  the  container  Pipe  to  be  threaded  in  such  a  correct  manner  so  that  the  4"  PVC  cap  shall  thread  onto  this  container  and  this  after  a  long  time  of  investigation  was  done  by  one  PVC  Fabricator  who  works  for  my  company.  And  it  was  said  by  him  that  all  PVC  Fabricators  in  the  construction  industry  will  be  able  to  thread  any  PVC  Pipe  or  you  can  contact  any  Hardware  Store  fella  who  will  be  able  to  get  the  Pipe  threaded  according  to  the  thread  thickness  in  the  4"  PVC  Cap.  These  4"  PVC  Caps  are  casted  caps  and  exist  in  any  hardware  shop.  
 4.  Working  on  the  Cap  Portion:  The  main  part  of  the  cannister  was  to  fit  the  motor.  Before  fitting  the  motor  on  to  the  cap  the  MOST  IMPORTANT  PORTION  TO  AVOID  LEAK  is  to  put  a  3mm  rubber  bush  (can  get  any  rubber  that  is  food  grade  for  this)  inside  the  cap  and  then  fix  the  motor  over  that.  The  Motor  was  fixed  by  getting  a  typical  1200l/hr  Atlas  Pump  (not  a  power  head)  and  it  was  fitted  inside  the  cap.  A  hole  was  drilled  in  the  cap,  so  as  to  accommodate  the  outlet  of  the  Pump.  On  the  other  side  (external  side)  of  the  cap  a  3/4"  PVC  pipe  was  fitted  to  become  the  outlet  of  the  cannister.  
 5.  Electical  :  Another  small  hole  was  drilled  in  the  Cap  to  get  the  Electrical  connection  to  the  motor.  For  this,  the  motor  wire  was  cut  into  two  portions  initially,  and  was  sent  through  the  hole  (as  we  cannot  accommodate  the  plug  through  the  hole).  Got  some  extension  wire  with  a  plug  and  attached  that  to  the  motor  wire  from  the  cannister  so  as  to  lengthen  the  electrical  cord.
 6.  Valves:  To  control  the  inlet  and  Outlet  of  the  cannister,  got  2  valves  similar  to  that  used  in  the  cannister  and  using  a  3/4"  pvc  threaded  hose,  connected  it  them  to  the  inlet  and  outlet  of  the  cannister.  The  green  hose  onto  the  cannister  is  fixed  where  as  onto  the  valve  is  removable.  Hence  similar  to  that  of  the  cannister,  i  can  close  both  valves  and  remove  my  filter  for  cleaning.
 7.   tank  Inlets  and  Outlets:  Used  3/4"  Acrylic  pipes  and  bent  them  using  templates  (a  cool  process  that  i  learnt  from  an  expert  -  will  share  it  soon  with  photos).  Made  2  U  Bends  and  used  couplers  to  extent  the  U  inside  the  tank  and  on  the  outside  of  the  tank  using  Acrylic  pipes.  From  Acrylic  pipes  used  the  threaded  hoses  to  connect  onto  the  valve  as  shown  the  picture.
 
 Bingo  and  the  cannister  is  Ready.  Cheer  
 
 When  operating  the  cannister,  found  that  there  were  no  leaks  at  all.  Even  had  it  pressure  tested  in  my  site.  Even  if  the  water  force  is  from  100  feet  high  it  can  withstand  without  a  leak.  Thatz  what  my  plumber  had  told  me!!!  So  a  success  it  was.  Rock On   
 
 
 Similar  to  that  of  a  regular  cannister,  all  that  needs  to  be  done  is  the  water  is  to  be  primed  on  the  outlet  from  the  tank,  then  switch  on  the  motor  to  have  a  flexible  cannister.  The  media  inside  the  cannister  can  be  separated  using  4"  dia  sheets.
 
 The  First  Picture  represents  the  entire  system  tried  onto  my  temporary  planted  tank...  Water  from  tank  is  siphoned  onto  the  cannister  bottom  and  it  goes  up  thro  the  media  and  the  motor  at  the  top  pumps  it  back  into  the  tank.
 
 The  Second  picture  is  The  Entire  Cannister  filter  with  the  inlet  at  the  base,  the  outlet  at  the  top  and  the  Valves  to  control.  You  can  also  see  the  extended  electrical  wire  connection  in  the  image  (Red/black  wires).
 
 The  Third  Picture  is  the  Outlet  from  and  Inlet  onto  the  Planted  tank  using  acrylic  tubes.
 
 Couple  of  thoughts  i  am  pondering  over  to  improve  the  system  further.  
 
 Any  suggestions  will  be  welcomed  with  both  arms!!!...   Chuckle  
 
 Pk
   Cheer
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amitava
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PostPosted: Sun Jul 15, 2007 12:34 am Post subject: Re: DIY Cannister Filter :All Features of an Expensive Canni Reply with quote

 Hi  Pk,
 
 It  is  fantastic.  I  am  sure  that  it  will  save  a  lot  of  money.
 
 Will  try  to  make  a  similar  one.
 
 regards
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krishanu
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PostPosted: Sun Jul 15, 2007 9:18 am Post subject: Re: DIY Cannister Filter :All Features of an Expensive Canni Reply with quote

 hey  pk...thanks  for  at  last  giving  a  complete  description  of  how  to  make  a  diy  canister  filter..with  pics!
 
 could  you  tell  me  why  you  have  used  a  pump  and  specifically  not  a  powerhead.  also  what  was  the  cost  of  this  system?
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sandeepraghuvanshi
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PostPosted: Sun Jul 15, 2007 1:26 pm Post subject: Re: DIY Cannister Filter :All Features of an Expensive Canni Reply with quote

 To  clean  this  filter,  do  you  open  the  cap.  what  media  are  you  using.
 And  how  much  did  it  cost.  Smile  
 Looks  like  good  work.  Please  keep  us  updated  with  any  issues  with  this  thread.
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shishirkamat
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PostPosted: Sun Jul 15, 2007 1:40 pm Post subject: Re: DIY Cannister Filter :All Features of an Expensive Canni Reply with quote

 Hi  PK,
 Excellent  design,Just  a  word  of  caution
 1)The  plastic  valves  are  useless,will  start  leaking  after  some  time,if  possible  go  for  the  Italian  valves  which  are  available  in  the  market.
 2)being  a  new  setup  try  to  keep  the  filter  off  in  the  night,any  problem  can  drain  your  tank  dry.
 I  am  not  trying  to  discourage  you,keep  up  the  good  work,You  can  very  well  be  a  threat  to  the  bid  daddies  who  manufacture  canister  filters  Thumb Up  
 with  warm  regards
 Shishir  Kamat
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gopiqpp
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PostPosted: Sun Jul 15, 2007 2:31 pm Post subject: Re: DIY Cannister Filter :All Features of an Expensive Canni Reply with quote

 Nice  design.  To  prevent  an  accident  that  may  cause  your  tank  to  drain  dry  I  suggest  you  drill  a  few  holes  in  the  outlet  tube  about  6"  below  the  water  line.  If  the  water  does  fall  to  this  level  the  siphon  will  stop  working  at  this  point.  I  am  not  sure  that  a  cannister  filter  should  ever  be  switched  off  as  it  might  lead  to  death  of  the  bacterial  biomass  in  the  filter.
 Regards
 Gopi
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Perikaruppan
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PostPosted: Sun Jul 15, 2007 3:32 pm Post subject: Re: DIY Cannister Filter :All Features of an Expensive Canni Reply with quote

 Thanks  Guys  ....
 and  for  your  queries:
 
 @kishanu..  i  used  a  pump  as  i  the  water  needs  to  pumped  in  an  upward  direction  and  only  pumps  do  that.  Power  heads  do  it  horizontally.  Since  my  Filter  needs  to  pump  water  upwards  pump  is  better  and  it  suits  the  operation  much  better  and  it  did  have  a  near-exact  fit  onto  the  cap.
 
 @Sandeep...  yes  i  can  open  the  cap,  just  by  turnin  it  around  similar  a  pepsi  1ltr  can  opening..  but  the  only  thing  is  more  rotations  are  needed.  fitted  them  with  from  the  bottom  :  Mechanical  Fitration  media  -  sponge  with  larger  grain  size,  Biological  fitration  -  by  bio  balls  and  ceramic  rings,  then  fine  fitration  by  using  first  5  micron  media,  abt  4"  of  clean  water  area  where  the  pump  sucks  the  water  upward.
 
 Reg  Cost:  Since  i  can  spell  out  the  numbers,  the  Entire  setup  shall  cost  you  abt  1/3rd  the  cost  of  a  regular  Atman  II  Cannister  including  media.  The  Cost  can  be  futher  reduced  by  a  hundred  or  so  if  you  use  PVC  Pipes  instead  of  Acrylic  pipes.
 
 @Sishir  ...thanks  for  the  infor...  yes,  they  kindda  leak  in  long  shot  that  is  one  factor  that  i  need  to  consider  in  modifying  the  design.  I  shouldnt  turn  off  the  filter  at  night,  it  doesnt  service  the  main  purpose  of  continuous  filtration
 
 @gopi...  I  dont  think  the  drilling  is  necessary  as  the  cannister  is  a  closed  loop  system...  if  it  is  an  open  system,  then  i  should  be  thinking  of  water  being  sucked  from  the  tank  thro  the  outlet  of  the  cannister  and  overflowing  my  cannister,  since  it  is  closed  i  dont  need  to  drill  the  piping.  And  so  far,  switched  off  power  many  times  and  on  re-power  it  works  like  a  normal  cannister...
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rgg
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PostPosted: Mon Jul 16, 2007 12:24 pm Post subject: Re: DIY Cannister Filter :All Features of an Expensive Canni Reply with quote

 Wonderful  design  buddy...
 
   This  means  a  lot  of  threat  to  the  main  cannister  filter  dealers....  Keep  up  the  good  work...
 
 Just  another  question  and  a  suggesion...
 
 Is  cleaning  process  a  nightmare  in  this...  i.e.  removing  media,  pump...  Do  you  have  baskets  for  them  ????
 
 I  think  your  cannister  design  is  too  narrow  and  deep...  Also  how  have  you  ensured  that  there  is  no  bypass  for  water  flow????
 
 Raghu
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nature_lover
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PostPosted: Mon Jul 16, 2007 12:33 pm Post subject: Re: DIY Cannister Filter :All Features of an Expensive Canni Reply with quote

 A  great  beginning  !!  Wish  you  luck  in  this  project  and  bring  out  more  modifications  to  make  it  more  accurate.  
 
 Have  you  considered  making  it  out  of  a  larger  diameter  pipe  to  increase  filtration  and  filter  media?
 
 Like  Raghu  mentioned,  do  you  think  bypass  would  be  a  major  issue?
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DJ_Rocky
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PostPosted: Sun Jul 22, 2007 10:03 pm Post subject: Re: DIY Cannister Filter :All Features of an Expensive Canni Reply with quote

 Hi  PK
 Great  going  sir,  a  wonderful  writeup.
 
 
                                                 
Quote:                
It  is  fantastic.  I  am  sure  that  it  will  save  a  lot  of  money.  
 Will  try  to  make  a  similar  one.                
Amitava  Da,  Please  let  me  know  whenever  you  will  be  planning  to  do  this.  I  will  join  you  to  learn  more  pratically.  Very Happy
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retro_gk
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PostPosted: Mon Jul 23, 2007 1:26 pm Post subject: Re: DIY Cannister Filter :All Features of an Expensive Canni Reply with quote

 Neat  job.  Two  things  I'd  consider  are  
 
 a)  A  gasket  inside  the  screw  on  cap
 
 b)  An  in-line  pump  placed  outside  the  filter  body  instead  of  inside.
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Perikaruppan
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PostPosted: Sat Jul 28, 2007 1:52 pm Post subject: Re: DIY Cannister Filter :All Features of an Expensive Canni Reply with quote

 Sorry  guys  for  the  delayed  response...
 
 thanks  raghu,  rahul  and  suraj.
 
 Raghu:  since  this  was  a  temporary  design  i  went  with  4"...  not  i  am  doin  a  5"  dia  acrylic  sump  and  it  has  turned  out  well..  i  have  ironed  out  a  few  negativities  such  as  the  threaded  method  of  sealing  the  cap  to  using  flange  method  -  i.,e  to  use  screws  to  seal  the  cap  with  o-rings.  Actually  amazingly  the  cost  of  a  4"  pipe  totalling  done  including  labor  charges  to  a  5"  acrylic  done  by  me  is  more  or  less  the  same!!!  so  i  think  i  will  stick  to  acrylic  pipes.
 
 and  i  dont  think  cleaning  will  be  a  nightmare  as  i  am  using  those  4"-5"  pvc  drains  that  are  used  in  regular  bathrooms  to  act  as  filter  media  separators.  
 
 Rahul...i  have  fitted  o-rings  in  the  flanges  to  seal  the  water  in  my  newer  design..  just  getting  it  going...  once  complete  will  place  another  writeup  on  the  same  should  be  done  in  a  couple  of  days...
 
 regarding  inline  pump  on  the  outside,  the  component  is  that  the  external  pumps  are  expensive  compared  to  that  of  internal.  The  main  reason  for  this  was  the  costing  and  i  am  able  to  get  an  internal  pump  for  a  much  cheaper  price  compared  to  that  of  external...
 
 is  there  any  reason  for  you  suggesting  an  inline  external  pump?  
 
 Pk
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retro_gk
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PostPosted: Sat Jul 28, 2007 2:01 pm Post subject: Re: DIY Cannister Filter :All Features of an Expensive Canni Reply with quote

 2  reasons  for  an  external  pump;
 
 a)  Safety-  no  need  to  worry  about  spliced  wires  and  short  circuits.  Fewer  holes  in  the  filter  also  lessen  the  risk  of  leaks.
 
 b)  Heat  dissipation-  heat  generated  by  the  pump  will  not  be  transferred  to  the  water.
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Perikaruppan
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PostPosted: Sat Jul 28, 2007 11:16 pm Post subject: Re: DIY Cannister Filter :All Features of an Expensive Canni Reply with quote

 hey  rahul  with  regards  to  the  wire  short  circuits  i  have  drilled  a  hole  in  the  top  of  the  cannister  and  thro  which  the  split  wires  are  send  from  the  motor  outside  where  the  connection  is  made  to  the  main  socket...  hence  eliminating  any  connection  with  water.  I  guess  a  3mm  hole  in  the  filter  wont  affect  the  stability  r  leak  factor  as  much  when  drilled  in  a  6mm  thick  sheet...
 
 I  totally  agree  with  you  on  heat-dissipation...  but  there  is  a  factor  of  Cost  associated  with  it  as  external  pumps  are  more  expensive...  and  IMO  i  dont  think  the  water  temp  should  rise  drastically  to  be  of  notice...
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retro_gk
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PostPosted: Sun Jul 29, 2007 11:11 am Post subject: Re: DIY Cannister Filter :All Features of an Expensive Canni Reply with quote

 How  much  more  expensive  are  in-line  pumps?
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