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Thread: big blues.
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05-07-2022, 07:52 PM #1
big blues.
I have recently purchased the biggest of the 'big blues' because i eventually got fed up with the inline cartridge versions and took the plunge. lol So i have had it installed for about 8 weeks and i am very pleased with it. i have been running it at about 1/2 litre a minute as part of my trickle system.
Question:
I realised before i bought it i would have to un plug it all and role it around the garden a bit to re arrange the carbon inside and stop the water 'tracking' through to allow it to maintain a chlorine reading of 0. Thats fine.
My question is what side should the regulators should be, the input side or the out put side? At the moment im running it on the input side, but regarding the 'tracking' issue, would it not be better to have the regulators on the output side so that the back pressure caused would help to 'seat' the carbon granules making more difficult for the water to 'track ' past.?
Thanks very much
James
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davethefish1 Thanked / Liked this Post
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05-07-2022, 09:17 PM #2
the pressure doesn't make much difference, the carbon is or should be down flow,
coming in at the top of the vessle travelling down through the carbon media compacting it, and up and out through the central tube.
with slow flow rates you get less dispersal through the bed the water moves through a smaller area within the vessle.
meaning regardless what you do to get full use from the carbon, you need to mix it up every few weeks...
as for 'tracking' that is a bit of a misnomer,
the water doesn't create gaps in the carbon to bypass the media, it simply moves through a smaller section of it.
where the carbon gets used up, you mix it back up to get the water to 'track' through more of the unused media.
there is a way to automate it but requires a 20 lpm water connection for back flushing (a lot more than you think) usually a 1" main water connection...
as you would need 20 bar to get 20lpm out of a 15mm domestic supply pipe
plus a big gap above the bed for expansion.
and an electronic backwashing head at £500 ishLast edited by davethefish1; 05-07-2022 at 09:30 PM.
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