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Washer Based Plunger Heads And Replacement Plunger Tubes - Please Help

Have searched, would apreciate help.

6 replies to this topic

#1 Aj

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Posted 26 March 2010 - 12:02 AM

Hi

The work you guys have been doing recently in here is f**kin boss. I have been incredibly impressed with the quality of blasters being produced by some of the contributors around here.

I live in Australia, and as such I don't have access to imperial size PVC, imperial size rubber washers and 1" PETG, so I have a few questions I'd like answered so that I may search for alternatives locally.

1st, everyone mentions 1" PETG coming from petco, I assume from my searching that it is a part for an aquarium gravel filter, however I'm not sure. Does anyone have the 'pet store' name for this product so that I can search for it more efficiently? is it a replacement part? does it come from a particular company or is it 'petco' brand?

I have seen some gravel filters with tubes that look about right online, however I'm reluctant to spend $25-30 to find out, and have yet to find the tube on its own. Any help information is appreciated.

Secondly, when finding rubber washers for the creation of a plunger head what relative size is appropriate?

Every thread i see says use xxx pipe with xxx washer, however I cannot tell how the washer fits in. Should i be looking for a washer that fits perfectly inside the tube? or should it be larger so that it bends into a cup like shape? if so how much larger? should the washer be closer to the OD or ID of the pipe?

I have done a lot of modding work, made breeches, machined a lot of plastics etc etc so I hope these questions are more justified than the average noob ones - I'm looking for a push in the right direction rather than the information handed to me on a platter

thanks

Aj

Edited by -Aj-, 26 March 2010 - 12:03 AM.

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#2 Hi Yah

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Posted 26 March 2010 - 06:14 AM

The PETG I got from Petco only said "1" thinwall tubing."
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The yellow balls are also slightly smaller in diameter than the green ones.

#3 erich76

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Posted 26 March 2010 - 06:26 AM

Last time I checked you can find Lee's tubing on amazon.
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#4 Aj

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Posted 26 March 2010 - 06:50 AM

Last time I checked you can find Lee's tubing on amazon.


Amazon do not ship to Australia, but thanks

Aj
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#5 pjotrkuh

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Posted 26 March 2010 - 10:10 AM

I have the same problems here in europe AJ, only PVC over here is way to loose for streamlines or CDTDarts, or are very thick walled = way to heavy for use in homemades.

Same problems with brass-tubing......

I think the PETG they sell in pet stores, is used to cover tubelights in aquariums...
I cannot think of another reason to sell clear rigid tubing.
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#6 phillypretzel

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Posted 27 March 2010 - 11:24 AM

-Aj- and pjotrkuh, I have net 30 day terms with McMaster Carr (a business account) here in the States, if I were willing to do the customs paperwork for say a 20% mark up on any imperial CPVC, PETG, fittings, etc that you needed, would you be willing to pay the shipping so I could get it to you? I will help you out if you would like. Let me know.
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#7 Lt Stefan

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Posted 27 March 2010 - 11:37 AM

For rubber washers, I usually go 1/8" to 1/4" larger than the I.D. of the tube. Then the metal washers that surround it are generally 1/8" to 1/4" thinner than the tube. That way you don't have to be exact and you get a good seal anyway.
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