does is come with union joints?

If the system calls for an IC-40, what model did you use to replace it. The price for the ic-40 model is a joke. I bought this model in 2015 for $580 now they are $1400. If you can possibly wait till supply catches up to demand, do so. I can’t .

For the IC40 is this a complete unit with an 8 ft. cord?

This unit comes complete with the cord. All you have to do with this unit is remove the unit from the pipes, unplug the old unit, and install the new unit. It took me less than three minutes to exchange the units. Very easy to change out the units.

how do you turn the unit off?

I use a separate timer similar to a pool pump or hot water heater timer (needs to be outdoor rated of course). I set the timer to turn the unit on after the pool pump is running and to shut off before the pool pump does. In the manual they say tie it in to the same timer used for the pool pump. I did that originally until I came out one morning and found the pvc on the inlet side had blown out and something had caused the titanium plates inside the unit to bow out. The consensus is the flow sensor failed (it happens), the unit was making chlorine when the pump shut off, chlorine gas got trapped on the inlet side, when the pump turned on the next morning the gas caused the pipe to fail. I think my situation was a perfect storm (everything had to happen exactly the way it did). I added the timer to make sure water was flowing when the chlorine generator turned on. I'm assuming you could also use Pentair's Easytouch or Intellitouch controllers since the generator plugs into those controllers.

is the replacement cell for the c40 chorine gen. has to be mounted upside down compared to my old cell..plus the new one looks like it has a cold wath

All you have to do is pull off the plastic "FLOW" cover and rotate the flow switch / sensor 180 degrees. Depending on how tightened down it is you may want to pull it (sensor) out, re-tape it and install it facing the opposite direction so it can be mounted to read easier and is sealed. JUST REMEMBER YOU ARE DEALING WITH PLASTIC THREADS HERE, do not over tighten. Now the genius who designed the cover marked "FLOW" with the arrow on it SHOULD have just made a slot on BOTH sides of the cover so it could be mounted either way. SO, you can either be creative with a small saw and cut your own slot, or just put it back on with it pointing in the wrong direction and confuse anyone who looks at it besides yourself. ;)The COLD led is just until water hits 55 or 65 degrees. No salt systems work "well" with water colder than that. Typically, if water is that cold algae won't grow anyway. But, if water got warm then cooled off again you might already have a little algae left over.

Manufacturer	Pentair
Item model number	520555
Product Dimensions	17.78 x 43.18 x 17.78 cm; 9 g
ASIN	B001DSLLH4

Pentair IC40 IntelliChlor® 520555 トレードグレード 塩セル塩素発生器

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Pentair IC40 IntelliChlor® 520555 トレードグレード塩セル塩素発生器