Vossy1
Landlord.
Not Barneey but, if your return is in the water bath and you have a complete circuit then the line shouldn't empty. I would suggest your water bath is lower than the python return or you have a air leak somewhere..easy enough to fix and if you've had no leaks above ground, I'd be looking at the top hose python pump connection :thumb:Barneey, how do you ensure that you always have liquid in the python line? I only ask because I followed cornelius's instructions and my pipe is empty except for when the pumps running even though theres 12m of pipe attached to it.