Quick Fill system ?

Anyone using the Quick Fill System on their boat batteys , Its made by Flow Rite , ????
Looks like it take a pain in the butt and makes it easy ! Not cheap either , Pros and con.

RR I've looked at it in the adds only. Looks like it would make it easy but for the life of me I can't figure out how you would keep from over filling the cells.

I think there is a ball check in the downspout, guess not many guys are using this system ! RR

I use it on my boat, have for several years. (3 batteries)
Works great, squeeze the bulb and when cells are full the bulb gets hard.
not cheap but worth it when batteries are hard to get at.
Had it on a tracker targa and now in a Lund.

Thanks CrappieKiller , After smoking a battery with a auto battery charger , I need to get a better way to put watter in the boat battery (3) Just cant see the level very good , Looks like its about 100 buck for the three battery deal , Hell its only money , I hate to change batterys , Pain In the Butt RR

QWIK FILL Watering Kit for 2 - 12V Batteires (KIT A)

this is the one I used along with kit B. my batteries are all separate and it was cheaper to buy them this way. I had parts to make them work separate from another boat that I had them in.

Here is a video on a motorhome, works the same in a boat.

Qwik-Fill Battery Watering System for Deep Cell Batteries - YouTube