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Old 12-18-2009, 08:04 AM   #1
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Fresh Water Tank Blade Valve Leaking

I noticed that the drain hose from my fresh water tank had a steady drip...drip of water. It was a slow leak, but over time, would drain the tank.

WRV used a blade valve (same as the grey water valve), and a remote pull handle, on the drain line. I pulled the valve apart and could not find any obvious reasons for the leak. I have never had much confidence in RV blade valves.

I replaced the entire WRV setup with a PVC ball valve, which I can easily get to from my storage bay. No more leaking.

Just an FYI if you haven't looked at your fresh water drain line recently.
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Old 12-18-2009, 08:15 AM   #2
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Agree, blade valves can be an issue. Good news is we dont need to use the fresh water dump very often--couple times a year? PVC valves come with issues too--especially the larger diameters. Depending on varying water conditions, minerals pit/build up on the ball and make the valve increasingly harder to turn. For this application, a brass-body valve might be a better pick.
PS--if you do go this route--consider adding a tee above the valve and re-directing the water feed pipe to your fresh water pump--adds maybe 15-20 gallons to your storage capacity [this applies to earlier model coaches that have the feed pipe out the side of the tank]
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Old 12-18-2009, 09:23 AM   #3
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If it is the same blade valve as mine it is called the "Super Plug" and was designed as a transom drain for boats. The lever on mine broke recently and I could not get a replacement as this valve is no longer sold. Mine would leak if it was closed too far. Had to manually pull it back a little to completely shut the water off. I will look in to Old Scout's suggestion as that would solve 2 problems I have.
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Old 12-18-2009, 11:32 AM   #4
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On some models the drain exits rearward of the forward storage bulkhead by maybe a foot, killing valuable storage space. Some have put in a bend to move the drain exit forward against the bulkhead and reclaim storage space while doing this plumbing redo.
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Old 12-19-2009, 07:53 AM   #5
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Yes, Mike is correct. If you remove the fabric covered mini wall, hiding the drain area, you gain an extra 18-24" of storage space, which I am now using.

I put the mini wall back together, but now I just slide it into place, with no screws. It still hides the drain assembly, but can be easily removed for access to the new storage area.
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