The TwinValve waste outlet and/or air inlet tend to constantly drip water?
The most common cause for this is ‘under-pressure’ within the filter. You can check if this is the case by placing a temporary restriction on the filter outlet where it returns to the pond. If, after a few minutes, the dripping appears to have stopped – it shows that under-pressure is the cause. Under-pressure within the filter can occur when the outlet back to the pond is relatively low in relation to the filter inlet. In these cases the water can almost siphon back into the pond from the filter. This reduces the pressure in the filter tank. (See also the User’s Guide, page 37 item 2). If there is low pressure in the filter tank… – There will be less pressure to shut the hydraulic membrane. – There will be a tendency for the air inlet to be pulled open, the air inlet may dribble and air may be drawn into the filter whilst running (this disturbs the beads and can also cloud the water). This low pressure, due to a low filter return, will be more of a problem…. – When the filter is n
