Coral Update 
Ultra RAH 
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Valves
Adjust Flow Rates with Ease
The PVC valves from the Osmopur brand are of very good quality. They are ideal for adjusting the flow rate of a return pump in the sump or for distributing different flow rates in several aquariums. The valves will also allow you to stop the water flow in your sump if you need to perform maintenance. You will find valves for pipes with diameters of 16, 20, 25, 32, 40, 50, and 63 millimeters, essential for a proper installation.
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