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Plumbing question - bath shower fixture plumbed backwards

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Plumbing question - bath shower fixture plumbed backwards

Old 12-28-2010, 10:17 PM
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Default Plumbing question - bath shower fixture plumbed backwards

I have one of the below. It is currently plumbed backwards (ie, starts at hot, then goes to cold). Can anyone FACTUALLY tell me whether this is a violation of code? (I am in NY).



Thank you all much for any input.
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Old 12-28-2010, 10:22 PM
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100% yes in Mass. and I'd guess yes in NY also.
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Old 12-28-2010, 11:17 PM
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Here too.
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Old 12-28-2010, 11:35 PM
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When operating a Monitor valve, the cold water should always come on first and rotating the handle counter-clockwise should then increase temperature. If this is not the case, the water lines may have been connected in reverse. This can be corrected by "flipping" the pressure balancing cartridge.




There are two types of valves. Choose A or B below depending on your series

A. 1300/1400 Series (RP19804)

Here are the steps to follow in reversing the operation of your faucet.
  1. Before you begin, make sure that you shut off the water supply to the faucet.
  2. Remove the handle. A clear knobs will have a Phillips head screw located just under the plastic cap; a lever handle usually has a small set screw located on the side.
  3. Slide off the finished metal (chrome, polished brass, white or almond) sleeve that covers the valve.
  4. Unscrew the bonnet nut. The bonnet nut is a large brass ring and should unscrew by hand. If it is too tight, wrap a towel around the bonnet and use a pair of channel locks. Make sure that the entire valve body does not start to rotate as you do this. Remove the bonnet nut.
  5. Do not pry the valve cartridge out of the body with a screwdriver. Place the handle on the cartridge stem and rotate it counterclockwise approximately 1/4 turn after the stop has been contacted. Remove the handle. Grasp the brass stem in the center of the white plastic assembly and pull it directly out, away from the wall. The valve cartridge should slide out of the body.
  6. Reinstall the cartridge after rotating the entire unit 180 degrees. Make sure that the raised plastic stop, marked HOT, is on the right side of the valve.
  7. Reattach the bonnet nut, trim sleeve, and handle.
B. 1700/1800 Series (RP32104 or RP32106)

Here are the steps to follow in reversing the operation of your faucet.
  1. Before you begin, make sure that you shut off the water supply to the faucet.
  2. Make sure the water supplies are turned off.
  3. Remove the sleeve, bonnet and cartridge. Pull the cap from the cartridge and rotate it 180 degrees or one half turn. Reinstall the cap on the cartridge.
  4. Reinstall the cartridge making sure that the key is fully engaged with the slot in the brass body. Be sure the HOT SIDE marking on the cartridge is facing toward the right.
  5. Install the bonnet and sleeve making sure the O-Ring is behind the groove on the brass valve body.
  6. Install the volume control handle with the lever to the right, then turn the handle to the ON position. Install the temperature control knob and rotate it to the left. The water should be hotter the further you rotate it to the left.
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Old 12-29-2010, 01:39 AM
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Good info, Fish.
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Old 12-29-2010, 11:09 AM
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Hey Fish, where were you when I tore out a wall after my helper plumbed the shower backwards?
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Old 12-29-2010, 11:40 AM
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Originally Posted by davedowneast View Post
Hey Fish, where were you when I tore out a wall after my helper plumbed the shower backwards?
X2. I did the same thing.
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Old 12-29-2010, 05:41 PM
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Similar for a Moen unit, just rotate the cartridge.
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