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+--- Thread: What’s This Part?? (head system) (/showthread.php?tid=7789)
What’s This Part?? (head system) - MC1600 - 07-29-2021
1999 4000 Express here…anyone know what this part is and what’s in it? It’s under the cabin sole, above the aux fuel tank, and plumbed between the master head and y-connection to the vacuum tank.
Are there duckbills in there or anything I need to clean out occasionally? Gonna replace my duckbills and pump bellow and want to get parts ordered all at once (without unnecessarily taking something disgusting apart!)
RE: What’s This Part?? (head system) - ReelMagic - 07-29-2021
It looks like a Domenica Standard 1.5" Inline Check Valve. (Back-flow Prevention) which uses 1.5" Duck Bills
RE: What’s This Part?? (head system) - MC1600 - 07-29-2021
So the only attention it needs is getting it out of there and replacing the duckbills?
RE: What’s This Part?? (head system) - ReelMagic - 07-29-2021
believe that is correct
RE: What’s This Part?? (head system) - dbruce222@gmail.com - 07-30-2021
(07-29-2021, 09:51 AM)MC1600 Wrote: 1999 4000 Express here…anyone know what this part is and what’s in it? It’s under the cabin sole, above the aux fuel tank, and plumbed between the master head and y-connection to the vacuum tank.
Are there duckbills in there or anything I need to clean out occasionally? Gonna replace my duckbills and pump bellow and want to get parts ordered all at once (without unnecessarily taking something disgusting apart!)
There is a duckbill in there. It is only needed if you are using the back head. I have a 2000 and I disconnected my rear head. So I don't bother changing that one when I change my duckbills.
If yo do use your rear head it is a easy change.
Dave
RE: What’s This Part?? (head system) - MC1600 - 07-30-2021
Thanks Dave. While I have you…there also appears to be a duckbill holder on the underside of my vacuum tank, is that the case? So by my count, the whole system needs 6 (4 at the pump, 1 at the check valve, and 1 under the vacuum tank)?
RE: What’s This Part?? (head system) - MC1600 - 08-03-2021
Just to close the loop on this, there are six 1.5" duckbills in the 4000E with the aft head; 2 on each side of the pump, one in the check valve mentioned above, and one more at another check valve under the vacuum tank (the latter of which is a %$*&^ to get to!