RO/DI solenoid, where to buy?

[kwirky]

Anyone know where to buy just a solenoid for an RO/DI system? J&L sells the kits with the float valve, but I just want the solenoid.

I plan on doing top off using a solenoid and an electronic timer, following this design:


designed by calvin415 on nano-reef.com
original post: http://www.nano-reef.com/forums/inde...st=0&p=645353&

I'm going to scale it by using a whole house filter, rather than a single RO prefilter chamber. I'm probably going to put a little pump inside too, since I suspect the RO won't be able to keep THAT much kalk mixed.

But good auto top off units are quite pricey, so I'm planning to run the system on a solenoid with an electronic timer. Time it so that it JUST under-tops the tank. Where it stands, my 120g system only goes through about 3-4 gallons of evaporated water daily, so I think running the unit for like 1.5 hours a day would work well.

Any suggestions where I could buy the solenoid solo? Preferably in Calgary if possible.