Question about Grohe Eurosmart, 3-hole Roman Tub Filler and Hand Shower w/ StarLight Chrom

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Diverter valve does not work correctly.

Eurosmart 3-hole tub filler w/ hand shower
When turned on, water flows from hand shower and diverter knob is set in the up position. Pushing down on the knob diverts water to the spout but when released the knob pops back up and water flow is through the hand shower.
The knob does not default the water flow to the spout.
In other words the water flows only from the hand shower and will not flow from the spout unless the knob is held down manually.

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The connections are reversed,just change them over and this will fix the problem.

Posted on Jul 26, 2009


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There are generally only two reasons for your problem. The first is that the diverter mechanism is simply wearing out and/or broken. The second it that there is a foreign object preventing it from doing its job correctly. Either way the diverter must come out. I have provided a couple of links below that should help get it out.

Once out, put a wadded up towel over the end of the tub spout opening so as to prevent any water from coming out of it. Then, for just a moment, turn your shower on full and adjust your temperature from full cold to full hot. This process should dislodge any foreign matter and send it out the opening the diverter came out of and also will probably get you wet. I usually plug the tub so I can catch what, if anything, comes out. Having a second person holding a bowl over the diverter opening helps reduce the water splash.

Rinse off the diverter and reinstall it. Turn the shower on and see if there is any difference in how much water comes out the spout while in the shower mode. If nothing has changed then the next step is to replace the diverter.

The diverter assembly part number is A603819

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There is a threaded stem that passes through the spout and attaches to the white plastic diveter valve. If you are starting from scratch (everything apart), you can put it back together in this order:
1) Place the white plastic diverter inside the spout. the circular side with the black round washer should face the the wall side of the shower (mating up against the threads for the water pipe).
2) The stem can now be inserted from the top and into the notched section of the white plastic diverter valve. The threaded end of the stem shoud be outside of the spout (from the top side).
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Should be ready to install now. Including the spout itself, there are 5 parts and are configured in this order from top to bottom.
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Mine leaks when I turn on the shower, thus reducing shower pressure. I looks like a poor design to me. The stem is not a tight fit in the spout and this allows the diverter to "wobble". The washer on the diverter valve does not seat tightly and allows water to leak out the tub spout when showering. I would replace the spout.

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