THE FILTER SYSTEM

I had purchased four Kokney Koi vortex units which were going to be instaled in pairs to each of the two bottom drains.  Firstly I dug out the filter bay to the required dimensions and depth, allowing for concrete base.  Next day out came the cement mixer and a 6" slab of concrete was layed in the base, then left a couple of days to cure.  When cured, blockwork was layed around the base to form the sides and back as well as a centre dividing and supporting wall, all to the same height as the pool walls. 


Inside at the rear of the filter bay, a low wall was built  and when cured was back filled with compacted soil then capped off wth concrete to form a shelf for the two Oase Pondomax Eco pumps (14,000lph each)  The four (two each side)vortex units were positioned into the filter bay and connected to the bottom drains and each otherthe first two having Jap matting and brushes and the second two filled with flocore media.  These were then connected to the pumps using solvent weld 50mm pipe.  From the pumps they were connected to two 30 amp UV sterilizer units and then back to the pool.

Left hand side

Right hand side



Pipework was now solvent welded to the surface skimmer unit then to a pump and then back to the pool with all three return pipes running side by side opposite corner to the surface skimmer.  Pipework was connected to the bottom connections of the 4 vortex's and end up to a common drain pipe via 50mm gate valves for the purpose of back flushing the filters.

Finally plywood lids wer made for the filter bay and were centrally hinged and covered with pool liners for waterproofing.


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