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Thread: Today’s the day...
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11-09-2018, 11:22 PM #41
As Liam said, I’d get those uprights solvent welded in now because they’ll be a pig to fit after the pour and your concrete may just go higher than the elbows so best to get them in now and then you’re sorted.
That’s what I did on mine and once the base was down I adjusted the uprights to ensure they were plumb 90deg and then let the concrete go off.
I’d also suggest dumping some concrete under the pipe runs and also around the sides to keep them nice and level during the pour and cure.
Also gives them some substance in case someone steps on them when floating the base out.
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Skoosh88 Thanked / Liked this Post
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12-09-2018, 12:40 AM #42
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Gray Thanked / Liked this Post
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12-09-2018, 02:20 AM #43
[QUOTE=Skoosh88;277418]Has anyone put celotex on the floor of their pond?? I was planning on it until I just looked at an old thread and they only did the walls??
If you are going to put celotex on the floor of the pond you will have to reduce the depth of your concrete or raise the height of your bottom drain. Raising the height of the bottom drain raises the height of the pipes which then doesn't have much concrete covering it unless you use say 1" Celotex. Probably the reason why some don't celotex the floor of their pond. However the deeper you go into the ground the warmer the ground is anyway which is why Ground Sourced Heating works. At 2m deep, there is a relatively stable 8-12oC temperature or so they say. The frost line ( the depth frost can get to) where I am in Scotland is 90cm and that is for something like a 100 year low, anywhere south of the border the frost line is higher.
Kenny
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12-09-2018, 07:24 AM #44
I’m sure it’ll be fine. It was just one of those “just in case” ideas so it’s not essential at all.
Will be great to see the finished piece later!
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Skoosh88 Thanked / Liked this Post
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12-09-2018, 07:45 AM #45
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12-09-2018, 08:12 AM #46
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Gray Thanked / Liked this Post
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12-09-2018, 08:16 AM #47
If you put say 25mm celotex on the base just chamfer the perimeter down towards the drain with a craft knife, it doesn’t have to be pretty as the fibreglass will cover it up, there should be enough adjustment in the stem of the diffuser to allow for the “finger thickness” gap but check first obviously.
Cut corner wedges with a bread knife or you can get a special saw (your builder may have one you can borrow, I wouldn’t buy one especially)
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Skoosh88 Thanked / Liked this Post
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12-09-2018, 08:18 AM #48
I’ve got a couple of meters of 4” lying around if you get stuck but am away from Saturday for a week, can leave it accessible if you need it mate
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12-09-2018, 08:29 AM #49
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12-09-2018, 08:30 AM #50
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bigcarpchaser, freddyboy Thanked / Liked this Post
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12-09-2018, 08:55 AM #51
Lol...
Procedure for me went...
Lay celotex
Cut hole in approximate centre of drain and slice outwards toward inside edge.
Cut round inside edge so you now have tour hole
Lay knife at about 45 degrees and cut round edge
Sand smooth (forgot about sanding out some imperfections, that’s where the dusty shit comes from)
Worked for me.
You also want a smooth rounded edge at the top where the glassing goes over the walls but under the coping. Basically no “sharp” edges.
If I can do it, anyone can. The hardest bit was doing the taped joints, I can’t even wrap Christmas presents up without using those little pre cut bits of tape so using that metallic tape was a challenge. Only wasted half a roll before I got the knack.
I wouldn’t worry about it being perfect, it’s going to be underwater and covered with algae so you’ll never know.
Bob said I’d done a good job but I’m sure he was just being nice lol.
Anyway, it looked pukka after he’d done his stuff.
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12-09-2018, 06:14 PM #52
Well the slab is done I think
It’s not perfect, a little bit bumpy and he didn’t quite get over the flange of the drain but close enough I reckon
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13-09-2018, 12:18 AM #53
Today’s the day...
Happy days! Looks good to me. My base and sides were rendered by me and I ain’t no plasterer so they were a bit lumpy in places. After the fibreglass went on you’d never tell as it all seemed super smooth.
Re the flange, better to be a bit lower than too high. My glasser took care of that on one side of my BD so I don’t have a lip before the drain now.Last edited by Gray; 15-09-2018 at 12:52 AM.
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13-09-2018, 09:26 PM #54
I put celotex on the floor too.
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13-09-2018, 09:46 PM #55
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13-09-2018, 09:47 PM #56
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13-09-2018, 09:49 PM #57
Concrete was ok to stand on when I came home from work so had a look under the pots to see how the BD’s had coped, chipped away excess concrete and it’s not too bad actually. The builder accidentally kicked the bucket over when pouring the concrete and a little bit has dropped inside but it scrapes off with a fingernail
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13-09-2018, 10:17 PM #58
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14-09-2018, 01:30 AM #59
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freddyboy Thanked / Liked this Post
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14-09-2018, 01:48 AM #60
Right this is just the thoughts in my head. If anyone has any real idea then let me know.
My Bottom Drain sits at 7.5 feet. The bottom of my pond is not flat (very roundy) and quickly rises parabolically to straight up. The deepest part is like a bowl and the BD sits in the middle of that and is actually set into the concrete so that the "flange" of the BD is actually around 1" below concrete level with the top (airy bit) of the BD just above concrete level. My pond is painted so there is no more height around the BD. I thought it was a good idea at the time and the muck certainly moves down the "hill" and into the BD. However I think that the air from the BD agitates incoming muck and sends (at least some of it) it skyward in the column of air/water.
My thoughts are that if the BD flange was level with the bottom of the pond then the "sook" into the BD would be across the bottom of the pond (albeit that it isn't even flat) rather than interupted by a 1" shoulder of concrete around the whole of the BD which possibly dissipates the "draw".
Not sure what the answer is (or if there is one) but I thought it was worth a mention when others on this thread have added celotex and chamfered it into the BD.
KennyLast edited by Handy Kenny; 14-09-2018 at 01:51 AM.
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freddyboy Thanked / Liked this Post
Every day feeding container?
Good shout, I'll have a look at Takazumi :)