Plastic Hose Clamps and U bends

Discussion in 'Beginner Discussions' started by 2balive, 28 May 2011.

  1. 2balive

    2balive

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    I need to clamp 20mm clear PVC piping to a barbed fitting (got a modetorium on flooding the house). The area is 3 cm above the water in the enclosed filter area so I don't want to use stainless steel.

    Where in SA can get hold of plastic house clamps like these?

    [​IMG]

    Also looking for plastic U bends like these?

    [​IMG]

    Any sponsor?

    PS No, cable ties don't work:boat:
     
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  3. pXius

    pXius

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    Those plastic clamps are used for pc water cooling aswell, check some online pc shops.

    Prophecy.co.za and lanmarkpc.co.za
     
  4. viper357

    viper357 Admin MASA Contributor

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    I've also seen those clamps on some pipes in car engines, so maybe try a couple of car spares shops as well.
     
  5. 2balive

    2balive Thread Starter

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    Thansk

    Thanks, interesting combination, fish, cars and PCs...
     
  6. Tremayn

    Tremayn

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    just add women :p
     
  7. robvdv

    robvdv

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    I think I have a packet of those plastic hose clamps, I think in 20mm. I bought them at the Milnerton market, believe it or not. Frankly, I think they suck. You can't ratchet them up precisely enough. Also, they crack under a bit of force. This might be because mine are old.

    I agree with you on the stainless steel. Rusts badly just above the waterline. Normally in this situation I'd use a number of large cable ties. What's the problem with this solution?

    With regards the return, I haven't seen them locally. You could make your own with some elbows, a barb fitting and a heat gun...
     
  8. durleo

    durleo

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    Cable ties will work but you must pull them tight with a long nose pliers.
     
  9. 2balive

    2balive Thread Starter

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    Cable Ties

    Hi

    Used cable ties the last time, found that they eventually creep (relax), specially a problem in warm water.

    My last ones poped when the outlet got restricted (quite spectacular) :eek:

    The metal clips did not fit anyway (lid could not open and closed properly) so used three cable ties on each fitting. Going to replace them every 3 months (FLW).

    PS, what do you do with the heat gun? Melt the pipe and fitting together?
     
  10. robvdv

    robvdv

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    Just for flattening a piece of pipe to make that spray end.

    There's another thought, though. You can use a heat gun to soften your 20mm PVC pipe to make it slide far up the barb on your return. That'll make it less likely to slip. When I use cable ties on warm flexible PVC pipe, the cable tie bites into the pipe quite nicely. That'll help avoid it slipping off. You could also use polyethylene braid and tie multiple knots over the pipe while it's warm. Poly doesn't absorb water like nylon does.
     
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