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I know this is probably done to death, but a lot of the posts I came across were older. I’m planning the drains for our new build (4 bed), did a percolation test at the weekend and took 7 hrs to drain away, so looking at treatment plants. Kind of narrowed it down to Bio-Pure, WPL, Conder but I do keep coming back to Biorock for several reasons. Any up to date opinions on the above? I do like the fact the Bio rock is electric free, I’m more than capable and happy to install and if I can commission, service it myself down the line even better. Also how are people finding the desludging intervals? On our own farmland so no issues with siting, probably going to be approx 35m from the house.

A (hopefully) useful learning point for those installing Biopure Sewage Treatment Plants We had a huge amount of rain fall yesterday afternoon, so much so that our deep flow gutters were at times unable to cope with the amount of water running off the roof. In the main, our drainage strategy coped very well, with all visible surface water being drained away within 10 minutes of the rain finishing. Given the volume of water that fell, I'm happy enough with this result. One issue that we did have was that surface water ran down a banking behind our treatment plant, and pooled on top of its lid. Up until now, any rainfall has simply run off the lid to the land surrounding, however yesterday, the flow / volume was too much, which resulted in the small air vent on top being submerged. Our air pump is located within an insert below the main lid, directly beneath the air vent. The insert filled with water, submerged the pump and tripped the electricity supply. There was no further damage caused to the treatment plant (i.e. being overwhelmed with surface water) as the pump housing insert was watertight. Taking advantage of a 10 minute break in the weather, I swapped out the pump with a spare and got the system back up and running without incident. On a positive note the IP68 rotary switch which connects the mains supply to the pump was bone dry when I opened it. The submerged pump has been stripped down and is currently drying out. The advice therefore is to ensure that the lid of the Treatment Plant remains proud of the surrounding ground, rather than level with or partly proud (as was the case for me), and ensure any surface water / heavy rain has somewhere to run off. If the worst happens, having a spare pump (as proved in this case) is certainly a worthwhile investment. Having identified this issue the hard way, I now have a small amount of diversion drainage work to undertake.