Siphon loop sucking air

[Adam Kerner]

I've recently replaced my head and all plumbing. I'm using a PH II, and all Sealand hoses. All seems working fine, except for the following: I've naturally installed anti siphon loops for both the intake and discharge hoses. The previous head was electric, and the intake loop had an electric vent on the loop. I changed this to a "manual" valve on the vent opening at the apex of the loop. When I pump the head, it sucks air into the line, so little flushing water enters the head. If I remove the oneway valve, and put my finger over the opening while flushing, it works great.I've now tried 2 different valves, w/ same result. Any ideas on how to keep proper suction in the line so that I can pump just water, while allowing air to enter when needed to break a siphon?Thanks,Adam

 

[Peggie Hall/Head Mistress]

I suspect you put it in the wrong place

The vented loop in the intake line cannot go between the thru-hull and the pump because it prevents the pump from priming. It has to go between the pump and the bowl. Move it, and your problem will be solved.

 

[Adam Kerner]

Problem solved!

I drilled a couple of add'l holes for the loop to route as you described, and END of PROBLEMThanks much,AdamKP46 Bravo