Jabsco 29200 conversion

[barjdel]

Have installed a new pump including total new outlet hoses, diverter valve and joker valve. Problem with air somehow entering the lower pump housing and causing cavitation with the result that the toilet bowl continues to fill when operating the unit. If I remove the lower connection point of the white connecting hose between the upper and lower pump housings, air bubbles from the lower housing nipple and, once the air is removed, the unit operates correctly for a while. Any ideas why this is happening ??

[Integral Loop]

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I have the same problem. Did you find a fix for it? Has anyone got any ideas what is stopping the pump from self priming?