Had it and removed it because it didn't work as efficient as you may thing.
Once or twice a year spend a little bit of time to inspect and if it needs a little bit of distilled water buy a 1 gallon jug at Wal-Mart and fill accordingly. If you can't see inside the cell use a small mirror like the ones they sell at Harbor Freight.
You can use a turkey baster if you need to add a little bit.
All you need I take the time and do it.
I bought a trojan system, pricey but worth it. My battery cells are covered up after I installed the Trojan T1275. Now I fill up all cells in less than 2 minutes and no dirty hands.
It came with a quick connect water line hose.
Have four six-volts so took two. Took a bit to cut tubes exactly but was easy to do.
I love it. Works great. Makes battery maintenance a snap. I can't get to two of my four batteries. No clue why they'd make the shelf so tight, but they did. This fixes that.
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"Next to prayer, fishing is the most personal relationship of man" Herbert Hoover
"American by Birth, Southern by the Grace of God"Lewis Grizzard
FROG AR-0019-242
2016 GMC Denali 3500Dually--2017 CC 36CKTS
I have two 6V batteries in my 2011 Georgetown and use an automatic watering system. The batteries are located at least 18" in from the sidewall and it's almost impossible to check the electrolyte level in the batteries. The system I have includes a pop-up indicator that shows that the batteries do not need additional distilled water. The included hand pump and the sealing valves on the tubing make it a 30 -60 second job to top off the batteries. I keep two 1-pint jars of distilled water for refill tasks. Additional distilled water is readily available from any grocery store.
I hadn't thought about draining it for the winter but I don't do that. I don't even know if there's a way to drain the system because there's a sealing valve where it hooks up to the hand pump.
I suppose I could remove one of the tubes from a cell cap and use the pump to blow out all of the water in the tubes. That still won't remove the water in the rest of the distribution tubes. The plastic tubing should also have enough stretch in it to not split if the water in it freezes. I know that mine hasn't over the last two winters, when there were temperatures well below freezing.
In the more than a decade I have used mine -- in winter storage in northern Illinois -- I have never drained the hoses themselves. Never had a fractured coupling or split hose, in sustained temps well below zero.