Replaced Joker Valve

[Gunni]

I need to replace mine as well. We're getting the back-fill symptom too. How often do they need to be replaced?

Choker valve every other year, flapper valve on rebuild (4-5 years). More often if you ignore the Jabsco winterization instructions and pickle the pump with antifreeze or use harsh cleaners. My PO was so proud of his vodka antifreeze method. And complained about replacing his pumps every year!

 

[Peggie Hall HeadMistress]

If done while using the pumping hose, you can see the clear water coming up- if there's a clear section of pipe in the pump hose.

Before I installed the larger vent we would pump out, add several gallons of with water, pump out, rinse and repeat... I was thinking the vent would do that, but I see what you're saying. As an analytical chemist I do tend to overthink most things!!

And I thought only engineers did that!

Ok...NOW I see what the problem is: Both y'all are confusing rinsing out the TANK with just rinsing out the vent line.

Rinsing out the tank is a completely different operation that nothing to do with the size of the vent or type of vent thru-hull...in fact, nothing at all to do with the vent as long as the vent isn't blocked:

Immediately AFTER pumpout, put 2-3 gallons of water into the tank via the deck pumpout fitting--'cuz that sends the water into the tank at the bottom to stir up any sludge and hold it in suspension so it can be pumped out. Repeat 2-3 x. Then, if you have a macerator or other overboard discharge pump, put another 2-3 gals of water into the tank and turn it on to rinse out the pump and its plumbing (might be best to wait till you're away from the dock to do this last step 'cuz even though you're only discharging clean water at this point, someone seeing it is likely to have a conniption!)

All this is in my book, btw......
Peggie
"If you can't explain it to a six year old, you don't completely understand it yourself." --Albert Einstein

 

[Justin_NSA]

I am ordering your book on Amazon
The admiral says our 'fresh' water is smelling like sulphur. I filter it when I fill.

 

[Gunni]

The admiral says our 'fresh' water is smelling like sulphur. I filter it when I fill.

You are taking out the chemicals (halogens) that keep the water critter free. If it is municipal water filter when you use it not when you store it.
Here is how to calculate water treatment for your tank size, both shock and storage.

 

[marchem]

You are taking out the chemicals (halogens) that keep the water critter free. If it is municipal water filter when you use it not when you store it.
Here is how to calculate water treatment for your tank size, both shock and storage.

Technically removing the halogens (chloride Cl-, Iodide I-, etc.) has little affect on the bugs. I think you mean the chlorine (Cl2), or hypochlorite (ClO-), which kill the bugs. It also depends on what sort of filter Justin is using: particulate, lead, chlorine, odor, etc. But you may be correct that the filtering is allowing production of sulfides.

 

[Justin_NSA]

This is the one I use to fill. It's what the PO used. It has GAC (Granular Activated Carbon) filtration

 

[Peggie Hall HeadMistress]

I am ordering your book on Amazon
The admiral says our 'fresh' water is smelling like sulphur. I filter it when I fill.

Thank you. If you haven't already ordered it, you'd be supporting this site if you order it from here instead (see link in my signature).

I suspect your fresh water system is past due for recommissioning. You'll find complete instructions on page 59.

 

[marchem]

This is the one I use to fill. It's what the PO used. It has GAC (Granular Activated Carbon) filtration

I'm pretty sure that will remove chlorine from the source water. Peggy's recommendation to recommission your fresh water system would be the first thing I'd try.

 

[JerryA]

Peggy,
Thanks for your explanation of how it all works. Interesting, because on my first two pumps I thought "Wow does that work better!". I was going to replace the vent thru-hull at the time, but realized I didn't have the correct tool. But, I was able to remove the obstruction and replace the hose. I added it to my list of things to do. My original joker valve was a red duckbill and it was pretty obvious that it was a problem when I removed it. The Jabsco was the tri-fluted style which seemed like it would seal better, although it's probably made of a lesser material.

JerryA