Richdon air drain

Richdons  own designed aerated bottom drain.
Hundreds sold over the last 5 years.
With a 1" air feed direct to the diffuser this is the best drain on the market.
No stagnent water, or flexi pipe.
No obstructive pipework in the sump.
A drain to last, and work well.
The diaphram can handle up to 400ltrs/min of air. With over 1 million of these diaphrams sold world wide, by the manufacturer
With the 1" pressure pipe feed capable of 15bar pressure. Most air pumps run at about 1 to 3 bar.
A must for every koi pond...
To fit this drain you will need 1" presure pipe and 4" presure or PVC pipe
4" pressure pipe output,
Can fit liner or fibre glass please specify
If using PVC pipe please specify