Painting DIY Spraybar - The Planted Tank Forum
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post #1 of 16 (permalink) Old 03-05-2015, 02:45 PM Thread Starter
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Painting DIY Spraybar

So, I'm not sure if I did something wrong or what. I made a spraybar out of PVC and painted it black with kyrlon fusion spray paint. Its been less then a year and the paint is flaking off. I didn't use any primer, possibly that is the reason its coming off?

I'm going to make a new one that is shorter, less 90 degree turns to see if it helps out my filter which is extremely weak. (sunsun 304-b). I would like to paint it in a way that it will last longer is there somthen else I could try or is this normal?
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post #2 of 16 (permalink) Old 03-05-2015, 02:47 PM
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I would say primer would be the way to go. I also try to take some abrasive to anything that is smooth when I paint it. Try either so steel wool or sandpaper. Sanding between coats also doesn't hurt.

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post #3 of 16 (permalink) Old 03-05-2015, 02:58 PM Thread Starter
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Ok, I have a bunch of steel wool, forgot why I bought it :S
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post #4 of 16 (permalink) Old 03-05-2015, 03:09 PM
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I used sanding cloth, but anything will do. Just enough to degloss the PVC.
The paint is finally starting to wear off mine. It has been several years and I have 3 Plecos in this tank. I do not know if the Plecs are clinging to the pipe and wearing away the paint.
I also use Krylon Fusion for plastic.
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post #5 of 16 (permalink) Old 03-07-2015, 12:10 AM Thread Starter
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Okay, made a new one today, prolly instal it next week or so. I'll take a picture of the before and after pics and see if the flow has improved at all. *crossing fingers*. Removed a lot of 90 degree angles and I'm planning on removing the 90s on the cerges reactor, will have to fiddle with it to see if that is possible.
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post #6 of 16 (permalink) Old 03-07-2015, 12:13 AM
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Plasti dip is my go to for stuff like this personally.
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post #7 of 16 (permalink) Old 03-07-2015, 12:27 AM
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paint

Bump: Plastic dip in the spray can is the way to go. Here's a pic of my new cerges.

Last edited by rick dale; 05-07-2015 at 12:23 AM.
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post #8 of 16 (permalink) Old 03-07-2015, 12:35 AM Thread Starter
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Bump: Plastic dip in the spray can is the way to go. Here's a pic of my new verges.
Looks real similar to mine, I'm trying to eliminate that 90 on the cerges though.

Well used spray paint again with primer/sanding between coasts so hopefully it lasts, that plasti dip do you spray it?
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post #9 of 16 (permalink) Old 03-07-2015, 12:46 AM
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Quote:
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Looks real similar to mine, I'm trying to eliminate that 90 on the cerges though.

Well used spray paint again with primer/sanding between coasts so hopefully it lasts, that plasti dip do you spray it?

Yeah I just have the one coming from my tank.
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post #10 of 16 (permalink) Old 03-07-2015, 12:47 AM
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is there a reason you wouldn't just use black pvc for this? when i wanted custom returns for my 75 gallon mbuna tank i made them from black pvc instead of using white and then worrying about painting it. you should do the same.
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post #11 of 16 (permalink) Old 03-07-2015, 01:13 AM
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Typically the darker PVC is schedule 80 (thicker) PVC and the white PVC is the schedule 40 stuff. Yes, the dark grey PVC will never loose it's color and obviously would be less noticeable.

FYI, on the primer before paint - make sure you are using a primer that is made for plastic. Regular metal primer will not help you. Sanding the smooth PVC prior to the Krylon Fusion will likely yield a much better result.
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post #12 of 16 (permalink) Old 03-07-2015, 04:30 AM
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I think by black pvc they mean abs which is truly black, not sch80 grey.
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post #13 of 16 (permalink) Old 03-07-2015, 04:52 AM
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I had the same results: krylon flaked off my PVC after about a year.

I think that scuffing up the PVC with rough sandpaper is probably the best option, but I'm curious to see how the primer works for you.

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post #14 of 16 (permalink) Old 03-09-2015, 11:05 PM Thread Starter
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is there a reason you wouldn't just use black pvc for this? when i wanted custom returns for my 75 gallon mbuna tank i made them from black pvc instead of using white and then worrying about painting it. you should do the same.

I must of missed that isle on my local hardware store, all I saw was CPVC and PVC. I saw some black PVC but there were no elbows/fittings.
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post #15 of 16 (permalink) Old 03-10-2015, 12:36 AM
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I must of missed that isle on my local hardware store, all I saw was CPVC and PVC. I saw some black PVC but there were no elbows/fittings.
At the hardware stores around me, the only black PVC they carry are for sprinkler systems. The sprinkler fittings are not really pressure rated. The threads have lower tolerances and I had a really hard time getting them not to leak. I eventually replaced all of them. They work fine if you put them on the spray bar, since if they leak they'll just drip into the tank, but they're not good to use anywhere outside of the tank.

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