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Collector

PostPosted: Thu 08 Jun 2017, 17:48:12
by scruffy.thedog
Hello

1st time post.. I have some newbie questions after looking at the videos

1. Do you have to have a collector or can the airlift(s) just float free/be suspended in a deep chamber? How deep should the collection chamber be if its used without a collector.. if the air lift is 1.7m should it be 2m or deeper?
2. If you use a collector do you need pipe work off the structure as in the videos or simply holes in the collector to allow water in for the airlift to suck up? i did not understand the need for the side tubes (How to build a airlift part 2 @ 11.20)..
3. Sourcing the pipes (eg pvc reducer from 125mm to 110 for the airlift and the 150mm collector pipes) in the UK seems to be hard who do you use in the EU? do you have a web address?

cheers Ian

Re: Collector

PostPosted: Sun 11 Jun 2017, 20:12:30
by Pssymon
Hello and welcome Ian.

1: The Collector is just the easiest way to get your required depth. Usually when converting to Airlift, people don't have a filter chamber at the required depth. The Collector is the easiest way to achieve this. If you already have a filter chamber that is deep enough, and can fit the Airlift, then that's fine to use as well. Collectors are usually about 2 meters in depth as this is a good length to house a 170cm Airlift. You need to account for the fact that the Collector sticks out of the ground above water level as well.
About the required length of the Collector, you need some room below the Airlift when it is placed into the Collector. If your Airlift nearly touches the bottom of the Collector this will be a bottleneck and reduce your yield. 5-10cm of room between the bottom of the Collector and the Airlift intake should be safe. When using a 170cm Airlift 2 meters is probably close to the minimal length of the Collector.
Technically you could make it smaller if you would use a shorter Airlift, but if you ever change your mind you can't easily make the Collector longer when it is already installed, so I would advise against it.

2: You mean the collars I presume. If you skip this step, the holes that have been drilled will not neatly sit flush with the pipe that has to be glued on to the Collector. Another issue is the fact that the only contact between the pipe and the Collector is this small ring which only has the thickness of the tube. If you glue this together you will get a very unstable and unreliable seal. The collar that we form will give better support and more contact area when gluing.

3: We've been looking into it. There are numerous suppliers here. We have some experience with a supplier in the Netherlands who specialise in PVC, with lots of items suited for pond building. Their website is https://www.xxlstunt.nl/. I'm looking into this for my personal project as well but it seems they have changed their business and have become a bit more expensive. I'm not sure if they can ship to the UK though.

We are working to provide Airlift kits, parts, and more on this site. This will solve a lot of problems as we can eliminate the issue of parts availability and compatibility in different countries.

Re: Collector

PostPosted: Mon 12 Jun 2017, 9:27:16
by scruffy.thedog
Thanks for the reply in 2) I think we have our wires crossed ie i was not clear :D

... i meant the 110 inlet and outlets as seen the the video at 90 degrees to each other ..if the collector is just to get water in for the airlift to sit in why to we need these? in the video of marcs pond his collector was in a concrete filter box ...i am right in assuming that the side pipes off the top are if you ONLY have the collector and no concrete filter chamber for the collector to be sat in exactly like the test set up measuring flow in the last video on the front page of the website

cheers

ian

Re: Collector

PostPosted: Wed 14 Jun 2017, 13:54:20
by Pssymon
Hi Ian,

After I posted my reply I already wondered if this was what you meant.
You are correct, when using a deep filter chamber you don't need a Collector at all. Marc used 'half' of a Collector just to get extra depth in his filter chamber. You can leave the entire top section of the Collector off in this case. The holes and pipework connecting to the top of a normal Collector are purely because the Collector is completely dug into the ground and acts as a separate filter chamber.
The test video does indeed give a good idea of how the Collector would be situated in a normal situation.

Do you have a filter chamber that is deep enough already or that you want to convert?

Greetings,
Roy

Re: Collector

PostPosted: Thu 15 Jun 2017, 16:32:00
by scruffy.thedog
Hi Roy no not at the moment no deep filter chamber ...no new pond yet :? in the thinking stage at the moment

I was thinking about the lack of availability of the 250 mm pvc collector pipe in the UK thinking of alternatives hence the question do you have to have one . Possible alternatives are:-

1. Just building a concrete block collector
2. These seem a good idea to me http://www.ebay.co.uk/itm/450mm-Inspection-Chamber-Manhole-Base-x-1-3-x-450mm-Riser-1-x-450mm-Lid-/322149027784?hash=item4b01940fc8:g:MhQAAMXQHU1RwEAk they are easily available in the uk in 350 and 450 widths and can be made taller with the modular rings http://www.ebay.co.uk/itm/450mm-Round-Manhole-Inspection-Chamber-Riser/192187644799?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D2%26asc%3D43783%26meid%3Df93231060d97490cb3c6649ad691fbce%26pid%3D100005%26rk%3D1%26rkt%3D6%26sd%3D263023918657 they also have the added advantage of having 110 pipe fittings for airlift at the top / valtera valves to waste at the bottom.

more research i think...

Ian

Re: Collector

PostPosted: Mon 19 Jun 2017, 15:02:04
by Pssymon
Hi,

A concrete block Collector/chamber will work as an alternative, no question. If done properly that's a good idea but it may be costly and relatively labour intensive.
That inspection chamber is an interesting idea. If you want to go through with that, be very careful to make sure that it suits your needs. It would be a shame if you would find out that you couldn't glue pvc to it for example, I'm not sure what type of plastic this is.
These riser rings look nice, but you have to be VERY careful and double check when you would glue them together (I guess that is how you would connect them?) that your Collector is completely without leaks.