Head Discharge Overboard

[ksouza12]

2001 GW 330. Forgot to open the valve in the forward bilge in order to discharge the waste tank overboard. Pump and float appear to be working, but no waste is leaving the tank. Sounds like there are some duckbill valves that may need to be replaced from when I tried to pump with the valve closed. Can anyone point me in the direction if they are the standard Dometic duckbill valves? Also looking for location of these valves and any tips for tackling this one...Thank you. - Kyle

 

[wspitler]

They are inline before and after the discharge pump. They are typical, but OEM Dometic are superior to replacement valves. Typically 1 1/2” but get the model “ to be sure. It’s messy so change the vacuum pump duck bills at the same time. You need to look at a schematic of the plumbing, understand which pump is which, and install new gaskets at the fittings.

 

[seasick]

I don't see how a leaky joker valve would affect the overboard discharge. Can you educate me

 

[ksouza12]

They are inline before and after the discharge pump. They are typical, but OEM Dometic are superior to replacement valves. Typically 1 1/2” but get the model “ to be sure. It’s messy so change the vacuum pump duck bills at the same time. You need to look at a schematic of the plumbing, understand which pump is which, and install new gaskets at the fittings.

Where is the discharge pump located? Assuming its behind one of the panels in the aft cabin as that is behind the head?

 

[Chutch]

The flush pump and discharge pumps are in the cave mid cabin on the starboard side. it could also be the pump bellows. Not to bad of a job. i changed out both bellows and the duck bill valves.