Which would produce more DO in a DWC?

Budley Doright said:
Nothing wrong with making a wheel better lol. Some have lots of time on their hands to polish their pipe .... excuse the pun lol.
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Yep, got lots of time to sit around and polish my pipe LOL! Yes, making a wheel better is called "progress" and is why we don't drive around with wagon wheels on our cars :)
 
Well I still polish my pipe but not quite as often as I used to ..... 38 year old girlfriend keeps this 60 year olds pipe polished to a shiny sheen :).
 
JSB99 said:
Yep, got lots of time to sit around and polish my pipe LOL! Yes, making a wheel better is called "progress" and is why we don't drive around with wagon wheels on our cars :)
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I wish we did still use wagon wheels .... I use em for my docks, hard to come by lol.
 
I've been fine tuning everything, and wanted to tackle a few things with the water pump manifolds. I was getting some hum through the walls from the water pump. One of the reasons was because I attached the pipes right to the wall using metal straps. I didn't use anything to buffer the vibrations. But I also think some of the noise is coming from the pump itself. I think the angle of the pipes is putting pressure on the pump, causing it to run rough.

I also wanted to strengthen the manifold supports, so that it was really tight. Opening and closing those ball valves takes some strength, and the pipes are bending back and forth. It's by a pretty small amount, but over time it might start wearing out the welds. I also wanted it to be strong enough to take some bumps. I was thinking about using some copper pipe hangers, but after brainstorming ideas in the plumbing isle, I came up with something way stronger, and they're adjustable!

I found these really solid ceiling hangers and collars, and picked up a 3/8" threaded rod to connect them
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I was trying to figure out a way to isolate vibrations from the walls. I was looking around the house, trying to come up with something. I happened to glance down and saw one of my old mouse pads. This was one of the thick, rubber mouse pads, and would work perfect!
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Cut the rubber dampers, and connecting rods to size
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I added a new melamine backboard, so the hanger plates have something solid to anchor to.
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Top view. I might add one more, towards the center, even though it's really solid. You can see the rubber pads mounted between the stand--offs and the board.
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Front view
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Final, after adding a shelf, mounting lights, etc...
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The starts are coming along nicely!
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Got the seeds from https://grow-legal.com. He's got a really good selection and prices! The owner is a member on RIU. I got my seeds really fast! Can't say enough good things :)

From left to right: Gorilla Cookies (Expert Seeds), Girl Scout Crack (Seedsman), and White Widow (breeder unknown), which was one of two bonus seeds! These are going to be Bonsai Mums. When I do the initial top, I'll take four cuttings from one, and root them to grow in the tent.
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Hi JSB,

To overcome resonance from pump to pipework I've used a few inches of flexible pipe or hose straight off the pump. I used lay-flat type hose that slipped over the pipe to avoid a point of restriction. Although looking at your setup it could be a little bit tight to do without some serious reconfiguration.. but it completely stopped the annoying resonating sound of pump hum...

Peace
BL
 
Billy Liar said:
Hi JSB,

To overcome resonance from pump to pipework I've used a few inches of flexible pipe or hose straight off the pump. I used lay-flat type hose that slipped over the pipe to avoid a point of restriction. Although looking at your setup it could be a little bit tight to do without some serious reconfiguration.. but it completely stopped the annoying resonating sound of pump hum...

Peace
BL
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Thx! If I'm still getting noise, I'll still work on improving it. I'll look at incorporating some of your techniques to help. I'm hopeful this will reduce it enough. I'll probably test it tomorrow, and I'll post my results.
 
Billy Liar said:
Hi JSB,

To overcome resonance from pump to pipework I've used a few inches of flexible pipe or hose straight off the pump. I used lay-flat type hose that slipped over the pipe to avoid a point of restriction. Although looking at your setup it could be a little bit tight to do without some serious reconfiguration.. but it completely stopped the annoying resonating sound of pump hum...

Peace
BL
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I've reduced the noise quite a bit, but like you were saying, I'm getting resonance hum from the pipes to the mounts, and to the board.

What I'm thinking is, drilling two small holes in each collar half, then screwing small, self-tapping machine screws, to where the tips have poked through. Then, the point of contact on each pipe is very minimized to the screw tips. Same concept as higher-end speakers with iso/tip mounts for the floor.

Thoughts?
 
Billy Liar said:
You'll still get some resonance with a rigid pipework connection to the pump.

Peace
BL
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It's okay if I get a little bit. My air pump is probably enough to drown it out some.

I did try the screw tips, but the collars wouldn't screw together with the gap. So now I'm taking a little different approach. I added a bead of silicon to the inside of the collars, to help dampen the vibrations, and trimmed the rubber backing for the plates down to size, to reduce the area of contact.

I'm' not ready to give up on my layout quite yet. It may look a little tight, but I can get to everything just fine. I'm not one to settle, so if I'm still not getting the results I want, I'll probably rebuild my manifolds, and incorporate vinyl tubing into the pipes to help prevent the wall from resonating.
 
Billy Liar said:
You'll still get some resonance with a rigid pipework connection to the pump.

Peace
BL
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Once again, I've learned from failure LOL

I was able to decrease the amount of noise, but I was still at 65dB on the other side of the wall. I unmounted the pipes from the wall mounts, and it's running virtually silent! It doesn't even register above ambient room noise!

However, I do still want to secure the pipes so that nothing moves when opening/closing valves. So I think I'm going to secure the mounts to the floor. I'll just have to seal them since they'll be mounted inside the flood area. The silicon I put on the inside of the collars should help grip the pipes.
 
ANC said:
Too small still.it will fill those pots in like 4 days.
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Does it matter that I'm growing these to be small mums? I wasn't sure if letting them get a little rootbound helped in keeping them small or not. If keeping them small primarily has to do with the topping and trimming, then I'll move them up to 4" pots in a couple days so that there's not a lot of loose soil.
 
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