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cestrum_gw

Is the first flush water diverter working properly?

18 years ago

I had a 5500L rainwater tank with a water diverter installed and, after the good rain over the past few days (over 50mL), expected it to be close to half full. (Yes, it depends on roof size and number of downpipes flowing into the tank and the number still releasing water onto the ground, but we've guessed it should have been at least 1/3 full.) It turned out to be only 1/5 full.

I've noticed that there is a small but constant flow of water from the water diverter. Initially, I just had it emptying into a 50L bucket. When the rain started, the bucket overflowed. So I emptied it and it refilled quite quickly (maybe an hour?). So I attached a hose to it to direct the water to the front (which doesn't need any more water because the rain hitting the ground gets drained along there anyway). The diverter isn't stopping the rainwater from the roof from flowing into the tank--I've seen it from above, and it's definitely flowing into the tank. But I wonder if it's failing to shut itself off and/or releasing the water too quicky or in too large a volume, so that less water ends up in the tank.

Any ideas? Does anyone else have one and how does it work?

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