having some difficulty with a build up of air in the pipes which leads to them being locked out after about 2 days and they need reset, by turning off, waiting an hour then bleeding air out for like 3 hours. Been looking into check valves or air bleed valves, but can’t find any that would work at low pressure and only allow air not water to bleed. Also been drilling 3 small holes then sealing with self tapping screws and ptfe tape to find the best location. It seems you need a least a few metres of head to allow a sufficient jet of water to come out the hole you have drilled, otherwise once the turbines are running it has an negative effect by sucking air in and equalising out the system, thus locking the pipes out much quicker.
I am looking at these at the minute to trial, but open to any suggestions or links found online of solutions, please!?