R21-EC head system modification

[JayandEileen]

Mod started with replacement of Jabsco control panel since it kept discharging waste tank whenever it felt like it. Replaced the electronics with a marine push button switch. Created a hose that fits into discharge thru hull using a dishwasher/disposal adapter connected to the end of 6 foot section of garden hose. Left female end of garden hose intact. When we are at RV dump, I insert adapter into thru hull and my wife pushes the "head discharge" button to dump the tank. I can also discharge into an RV portable dump tank or with the correct adapter I can dump into an sewer connection at an RV park. Better solution would be to find a thru hull that has internal threads so I don't have to hold the hose. I can provide photos if anyone is interested.

 

[captstu]

Thank you. Is there any way to tap the head, shower and sink thru hulls so I could screw in an adapter and hook all gray and black water to camp sewer?


Stuart Bell
Ranger 25: Shearwater
(561) 352-1796

 

[JayandEileen]

I have been looking for that but haven't been able to find one yet. I may try taking a thru hull to a machine shop and see if they can tap some threads into it. I will let you know if I have any success. The friction fit I did is probably enough for a grey water connection but would not want to gamble on it working for black water without holding it.

 

[MACHAYA21]

Marinedepot.com has a double thread through hull 1 inch diam fitting.
$5.39

 

[JayandEileen]

Took a look at the part at Marine Depot which mainly carry aquarium parts. Looks like it is plastic and might actually work but I would really like something in brass or stainless steel since this thru hull is close to the waterline level.

 

[MACHAYA21]

Jay,
Get an appropriate sized metal thru hull and have a machine shop cut threads inside.