07-29-2012, 05:34 AM
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Rena filstar xp parts
A few months ago, I complained to Mars Fish Care, the distributor of the Rena Filstar XP series pumps. I told them that the inlet pipe should be manufactured to better specifications. There are problems with the inlet pipe. This is the part that sits on the edge of the aquarium. Now I have two of these pumps and one is a backup. Well thier cannisters will accumulate air and I narrowed the problem to the inlet pipe. This inlet pipe also has a pipe cap and the pipe cap seal is nothing more then paper. Its the same as what you would find on the inside of a ketchup bottle cap. I can also see and feel a rough edge at the top of the plastic counterpart where the seal meets this edge and is supposed to prevent air from being sucked into the inlet pipe.
The other problem is where the suction hose fits onto this inlet. The wall thickness is too narrow to support a clamp properly; be it made of plastic or metal. It appears that using a clamp and securing it tight enough so that the suction hose has no chance of slipping off creates a distortion of the plastic which allows air to enter.
So when I mentioned these two problems to the distributor; thier answer was to send me two inlet pipes. Well soon, they too failed and the cannister would start filling up with air.
How do I know that the inlet pipe is failing? Well I made my own inlet pipe out of schedule 40 pvc.
An overnight test proved me right. There was no air in the cannister.