My water supply comes into the shower valve body from above, not from below. Can the internal diverter be removed and installed in the opposite direction?

It doesn't make any difference to the shower valve if the supplies come up from the floor or drop down from above. I'm interested in why you're asking. Is there a problem with the diverter? If so is your valve one handled or three knob? What's the brand name? Let me know. Tom

I am trying to replace the valve body because the shower doesn't shut off and on completely. I purchased an American standard cadet two handle bath/ shower kit.
I saw no difference at purchase for water from below or above.
I have it installed the way the old one came out and now notice that the instructions specify that the portion of the valve body marked "SHR" must be connected to the shower.
I put it in with "SHR" toward the tub faucet in order for the water supply to connect from above.
I assumed that the valve only works in one direction and is going to be upside down now.

You have installed your shower valve upside down. Shut the water offc, pull the valve and install it correctly.

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Can the internal diverter be removed and installed in the opposite direction?

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The diverter's in the spout. The answer's no. Good luck, Tom

If I install the valve body the other way the water connections are pointing down to the floor. My hot and cold water source pipes are coming down from the ceiling. How do I hook the water in?

Sprinkles, A shower valve operates on line resistance and head pressure. Since water, like electricity, will take the path of least resistance, In a shower valve both the spout and the shower head are connected. It's just less resistance for the water to travel down 6 or 8 inches to the spout then it would be to travel up 27 inches to the shower head. But think! He installed the valve in upside down. This means off is on, right is left and to anybody stepping into the shower this would be confusing to say the least. I don't really understand your problem. This was the originiol complaint.

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My water supply comes into the shower valve body from above, not from below. Can the internal diverter be removed and installed in the opposite direction?

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1) The 1/2" street 90's that fit in the valve body will turn up or down so what different does it make if his supplies are raisers or drops?
2) You ask if the " internal diverter be removed and installed in the opposite direction?" I didn't understand it then and I don't understand it now. In the first place he doesn't have a "internal diverter" His diverter is in the spout. Sounds like he was asking to reverse the spout.

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If I install the valve body the other way the water connections are pointing down to the floor. My hot and cold water source pipes are coming down from the ceiling. How do I hook the water in?

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The brass shower valve body has hot and cold openings that street ells go into. They can be turned either up for supplies coming down or down to pick up supplies coming up from the floor. A shower valve can be hooked up any way that you wish. What makes your valve different? What am I missing here? Regards, Tom

Let's start over Sprinkle1. Tell us why you are prevented from installing the valve the correct way? A picture would be nice. Mark