Hi, I just installed a moen l82839 shower/tub assembly. The problem I am having is that when I turn on the water, just to the tub, water comes from the shower head. The knob that turns on the shower head on the faucet is down, noting is leaking otherwise. I don't know what's wrong. Its like there is a small trickle of water going up the shower pipe instead of all the water going out the faucet. Any ideas?

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Originally Posted by RubixCube

Hi, i just installed a moen l82839 shower/tub assembly. The problem i am having is that when i turn on the water, just to the tub, water comes from the shower head. The knob that turns on the shower head on the faucet is down, noting is leaking otherwise. I dont know whats wrong. Its like there is a small trickle of water going up the shower pipe instead of all the water going out the faucet. Any ideas?

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A few. First I want you to remove the spout and then turn the valve on. Let me know if you still have water coming out of the shower head and I'll have a answer for you. Regards, Tom

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Originally Posted by speedball1

A few. First i want you to remove the spout and then turn the valve on. Let me know if you still have water coming out of the shower head and I'll have a answer for you. Regards, Tom

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You're hoping he didn't install it upside down, right?

No, if there's something in the spout that giving him a little back pressure that would give him the situation he's having. The others could be too short a shower raiser, too much house pressure etc. This job will be a process of elimination. I don't think you're going to jump right in with a answer. However, If you have one feel free. Cheers, Tom

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Originally Posted by speedball1

No, if there's something in the spout that giving him a little back pressure that would give him the situation he's having. The others could be too short a shower raiser, too much house pressure ect. This job will be a process of elimination. I don't think you're gonna jump right in with a answer. However, If you have one feel free. Cheers, Tom

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You're probably right, but when I hear of these valves going points up immediately after installation, I usually look at the installation first.

The venturi going up to the shower head is a considerably smaller diameter than the one going down to the spout, if you install it upside down, the smaller venturi will try to push the water to the larger venturi.

Sorry to sound so cynical, but I've come across it too many times to not throw it out there as a possibility.

What about it Rubix? Could you have you installed it upside down?
Growler presents a interesting question. I know this can happen. Back when I was running condo projects I walked into a unit that the helper had preassembled 8 showers upside down. The two plumbers hadn't caught it yet, and I have no doubts they would have, but the point is the showers were assembed upside down. Could this have happened in your case? Also, and I should have asked this earlier, do you have a PRV,(Pressure Regulator Valve) and have you noticed you have higher water pressure lately? Regards, Tom

Well, it was a pressure issue. I had a small 90 installed at the faucet end which inturn created back pressure and forced the water up the shower. I installed a bigger 90 and everything worked out. Thanks for all the replys.

Why is there water coming out of the spout pipe and shower when I turn the water back on?

Hi zanitra,
Start your own thread and give more information about your problem.
Click on Ask about Plumbing to start new thread.

I run in to this in remodeling all the time. Add 4 90 to make a C . Cut the stem to the length of your C and glue,pex,flex copper in the line and this will change the difference in pressure in the stem and adds to stem length. It's a crazy but works fix

Hi TheRodgod and welcome to The Plumbing Page at AMHD.com. You're responding to a 7 year old dead threads . Please check the date before you post. But we thank you for the input. Tom