CO2 diffuser all parts ex-stock B&Q 6.38
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  1. #1
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    CO2 diffuser all parts ex-stock B&Q 6.38

    Following Claudes kick up our collective jacksies I thought seeing as I've got to go down B&Q anyway I'll have a quick look & see if I could cobble up a CO2 diffuser from the bits they had.

    Here it is. Step by step. Total cost excluding solvent weld 6.38

    Parts list

    2 x Washing Machine/Dishwasher Nozzle 1.48 ea
    2 x Access Cap 0.68 ea
    1 x pack 10mm Pipe Inserts 0.88 ea
    1 x 2 metre length 40mm ABS Waste Pipe 1.18 ea

    Here it all is layed out. I took a rough geuss at a length of pipe that would hold 5 bio balls & added a bit. Mine is 10" but the length would be entirely upto the individual with the saw
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  3. #2
    to destruction & beyond ! davethetester's Avatar
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    I didn't include the cost of the Solvent Cement at 5.07 but you'd have to buy some if you had none.

    Here are the 2 access caps
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    And here they are glued in place. My advice would be don't spare the solvent cement on both surfaces. Just wipe up what squidges out.
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    Here are the Washing Machine nozzles
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    Bin the O ring & gland nut.
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    Here's the bit I bodged for speed. I drilled 2 x 20mm holes 1 at either end of the main tube. I knew it at the time but these holes would have been better drilled 19 or even 18mm but I only had a 20mm spade bit so it had to do. If you wanted you could drill the Access Caps to give you an "in line" type. I think this would better but I would have bob hope of getting it in my tank stand.
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    I then solvent welded the washing machine nozzles in place & clamped for an hour. Overnight would be better. This is just a prototype so will never be used. At this stage it became apparent that time spent aquiring the correct size drill would be time well spent. My nozzles were a bit sloppy and deffo required clamping. If you drilled the correct sized holes you would more than likely not require the clamps.
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    I'll call these the CO2 nozzle. They are really called 10mm Pipe Inserts & I have no idea what they are actually for. Anyway they come in a pack of 4.
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    They have a 6mm outside diameter.
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    I had the correct sized drill this time - 6.5mm
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    Solvent weld in place
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    Finished article looking down the barrel.
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    Just needs some bio balls. I'm not convinced of the integrity of the access caps at the pressure that will be running in there but the guy in the plumbing section at B&Q assured me they were pretty good. I'll hook it up to a powerhead tomorrow & see how we go.

    As usual shoot it down folks
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    Last edited by davethetester; 04-05-2006 at 01:09 PM.

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    Looks good, nice work fella. i would imagine the washing machine nozzles wouldn't weld too well to the ABS pipe tho as the PVC stuff tends not to melt very well? Might be an idea on the next one to solvent weld & silicone as a belts and braces type thing?

  17. #15
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    Thanks Claude. I'm pretty sure the nozzles are ABS too. As suggested though they are gunna get a good siliconing before I go to bed tonight.

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