Amps to head

[crieders]

I'm hardwiring my old Wilcox Crittendon head to the house battery bank.
I noticed that the emergency battery that it previously used was 2 1/2 amps
Can I wire it to the house battery bank which is 2 12 V batteries wired as 1 12Volt?
What size fuse should I use?
I looked at the motor on the old head and there is no label on it as to amps

[Dave Spencer]

Cliff,
You should have no trouble wiring to your main battery bank with 2 12v batteries (presumably wired in parallel so you get 12V nominal output but more amp hrs capacity).  Thetford handles Wilcox  Crittenden now and although many (all?) Wilcox Crittenden heads are now obsolete, they still have manuals on the website and parts available.  If your head is an electric "Comfortmate", the recommendation is for a 10A fuse or breaker.  Here is a link to the Thetford site with lots of old manuals for your perusal. http://www.thetford.com/HOME/PARTS/PermanentToilets/ComfortMateElectric/tabid/840/Default.aspx

Good luck with your modification!

[crieders]

Thank you. Great