Adding water to flooded RV batteries can be somewhat difficult as the above picture shows on our 2014 Milan 26RLS. The battery bank is behind the propane tanks and the front of the trailer slopes forward over the batteries. This isn’t a problem if you have sealed batteries that do not require topping of the water. I prefer flooded batteries that can be tested with a battery hydrometer as I shared in this post with instructions on using a battery hydrometer. The downside of these flooded batteries is they periodically need to be topped of with distilled water. As with most things in life, there is a proper tool to add distilled water to a flooded battery — the battery water filler.
When I first started working on cars decades ago, all automotive and deep cycle batteries were the flooded type. We used battery water fillers to quickly and accurately top off batteries. However, these large 1 gallon fillers are too large and bulky to use in tight spaces. So for the past 15 years I have been transferring distilled water into little 1 liter water bottles and using these bottles to top of our trailer batteries. Sometimes I accidentally add too much water and often spill a little on the top of the battery. Usually it would take more than 1 lite of water to top off the batteries, so I would have to refill the 1 liter bottle again to finish the job. Also it was not easy to see the level of each cell and I would need to hold a small flashlight while leaning over to see each cell and at the same time add water.
Knowing that this isn’t the best way to top of a battery, I finally got around to shopping for a smaller battery filler that would be small enough to use in tight quarters, such as our Milan trailer. For me, shopping is a one stop online trip to Amazon.
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Performance Tool W54274 2 Quarts Battery Filler with Auto Shut Off and Drip-Free Valve, Perfect for Golf Cart and Deep Cycle Battery
$14.55 (as of June 28, 2024 21:20 GMT -07:00 – More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
I found this 2 quart battery water filler. It is similar to the ones I used as a young man (somewhere in our garage I still have one those large fillers). After adding distilled water to the filler, the spring loaded spout is placed into the battery cell and the spout will automatically shut off when the cell is full.
Not only does this thing work great, it was only $5.99 and I got in 2 days with free shipping, since I am an Amazon Prime Member.
