Hydrovolt Question

[Resthome]

I have a question for anyone using a MidNite Hydrovolt.  I have a Flow-Rite watering system on my battery bank that fills each cell to the correct level from a jug of distilled water. It has a very small hole for a hydrometer with a small filler tube. Can anyone give me the outside diameter of the filler tube that is on the Hydrovolt?
,
From the picture it looks like it might be small enough to fit into the Flow-Rite Millennium battery caps for taking S/G readings.

[SolarMusher]

Hi John,
6mm for the outside diameter filler tube.
A+
Erik

[Resthome]

Thanks Erik. 

[TomW]

Just to be a stickler.

I think it is actually called Hydrovolt?

Makes searches work better, mostly.

Tom

[Resthome]

You are  correct Tom.  Thanks for the correction.  Modified my post

[SolarMusher]

Anyway..., it's the same diameter for both 
Merry Christmas!
A+
Erik