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THT BrainTrust: Shower Plumbing problems

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THT BrainTrust: Shower Plumbing problems

Old 09-03-2016, 07:23 AM
  #1  
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Default THT BrainTrust: Shower Plumbing problems

I really am stumped here & need some help so where do I turn, The Hull Truth!!!

So my shower has been decreasing in hot water pressure for the last couple of months. I'm on well water close to the beach. At first it wasn't enough to cut off my tankless hot water heater so I still had hot water but just low volume. I tried descaling my hot water tank (rinnai) to no avail. I talked to a buddy who mentioned the valves might be the problem. Ended up calling Ben Franklin plumbing to lend a hand = mostly big mistake. Plumber came in and took valve off of bathroom sink and it had a little sediment so clean it off & reinstalled. Hot water pressure is back at sink. Move onto the shower. Plumbers were not familiar with 2011 Kholer shower/body tiles & valves. Removed face plate and took out the thermostatic mixing valve. They stopped there & said this was my problem. Couldn't help me any more. They reinstalled it & turned on my water and now I have No cold or Hot pressure. Before they arrived I had full cold pressure. The plumber then starts trying to adjust the integral supply stop (hot & cold) this helped nothing. He's frustrated and leaves saying he can't do anything for me??

So this is where I'm left, no pressure at all. I call Kholer & have them send me a new thermostatic mixing valve. Replaced it. Same thing No pressure hot or cold. I pull out the integral supply stops to check filters. They seem fine. So I pull out the volume control valve its fine. Put it all back in place still no pressure just a trickle.

So what say you brain trust. I'm stumped & the admiral is not a happy camper (pics of admiral not available till she can clean up). I can post pics of valves if needed.

Anyone with any ideas??
lilnoah is offline  
Old 09-03-2016, 07:47 AM
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Is it just hot water in shower?
If it is the whole house make sure you have good water flow to your hot water tank.
Kitchen sink has good flow? If kitchen sink has good flow, then has nothing to do with your hot water tank source.
If just low pressure in shower replace internals on shower valve. Plastic cartridge, this can be purchased local hardware store. Just takes a little of sediment to stop flow of water.
Also take shower head off. Clean inside or replace, overtime build up gets in there's slows pressure.
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Old 09-03-2016, 07:49 AM
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Clean it and reinstall again. make sure the stops are wide open.
It is a pressure balanced valve, so one of the supplies is not flowing causing the valve to trickle. Follow the diagram, not the plumbers work.
Some integral stops are ball valves and some are screw valves. try turning the water on without the escutcheon plate on and turning the stops around.
Try turning the stops on without the valve in the body to check flow, just make sure you don't have any seals/washers in there that can shoot out.

Sometimes we soak them in CLR or vinegar to remove the scale from the internals of the valve. Some of the valves rattle when you shake them letting you know that the pressure balance system is free.
Sounds like the plumber put something in incorrectly and you are repeating that example.
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Old 09-03-2016, 07:51 AM
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Also good idea when you have plastic mixing valve out, turn shower water on real quick. Water should fly right out. Blowing out any trapped sediment. Make sure shower curtain is closed. Water will spray good for this!
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Old 09-03-2016, 08:42 AM
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Did the shower head get checked for sediment blocking the outlets ?
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Old 09-03-2016, 09:01 AM
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Did you try duct tape?
Ahoy Vay is offline  

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