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Let’s do a simple checklist:
1. Adjust the in-tank box side as low as possible. We can fine tune this later.
2. Make sure there are no air bubbles in the U-tube
3. Check to see if the drain line is only 3/4” - 1” under water in the sump chamber.
4. With the pump running, do you see debris/bubbles whizzing through the tube? A well-tuned overflow box will self-clear any air bubbles. You can test this by using an airling tube and gently blowing air into the u-tube inlet while it’s siphoning.
1. Adjust the in-tank box side as low as possible. We can fine tune this later.
2. Make sure there are no air bubbles in the U-tube
3. Check to see if the drain line is only 3/4” - 1” under water in the sump chamber.
4. With the pump running, do you see debris/bubbles whizzing through the tube? A well-tuned overflow box will self-clear any air bubbles. You can test this by using an airling tube and gently blowing air into the u-tube inlet while it’s siphoning.