You can feed 3/4" with the 1/2" I'm not sure whether it's needed with three heads though. The Kohler specs don't give you much. You will get more responces if this information was posted on the forum. I don't think anyone reads the blogs.
Ok Gotcha, I'm clear on the 3/4" loop. The question that remains in my mind is; can I feed the loop with 1/2". The diverter valve has 1/2" threaded holes to connect the pipe, therefore I figured the Pipe from the diverter to the loop should be 1/2". What would the effects be if I feed the 3/4" loop with 1/2" supply? Or should I go with 3/4" right from the diverter?
Increasing pipe size always increases flow. Reducing pipe size restricts flow. Pressure is always constant, but if you reduce pipe size, you increase friction. Have you ever tried drinking a milkshake through a tiny straw? Most water meters are 3/4", but increasing the water service pipe to the home from 3/4" to 1-1/4" increases the usable water that can be used at one time.
Hi Terry, thank you for your response. I too thought the loop should be 3/4" but the supply from the Diverter valve is 1/2" so I stayed with that. Plus I didn't think I should go from 1/2" to 3/4", thought there would be to much of a reduction in pressure. Thanks again, Stewart
PEX is a little undersized compared to copper. Normally you run a loop in 3/4". However it may be that with the restricted shower heads it may work. The Kohler instructions seem a bit slim, without dimensions. It looks like a 1/2" loop. If you are on a loop, I don't think the distance is going to be critical.
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