Improved design and performance means that this next generation 500GPH pump will produce this flow at just 12V rather than 13 Our next generation of Rule pumps include check valves and to do this, we have created hidden air vent to prevent airlocking Under each strainer tab there is a small hole that vents any air trapped in the pump housing preventing airlocks Special Requests must be Presented and Approved by us with EBAy Messaging before you Purchase the Item . Buyer may Return an Item if Returned within 30 Days of Receipt of item. Buyer may be Charged a Fee if the Item has been Damaged or Altered by the Buyer Please use Ebay messaging only to Communicate with us. Any other means of Communication will not be read. Any Special Requests or Address changes must be made with Ebay Messa.
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