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Anti-scald shower mixer question

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  • Anti-scald shower mixer question

    Hi Guys,

    Thanks in advance for looking in on my question.

    I decided to install an outdoor shower to rinse off after hot tubbing. I thought it would be a neat feature to have hot water, but the hot water heater is clear to the other side of the property. So, I decided to get a Titan tankless electric heater. I installed this in a NEMA class 4 waterproof enclosure, all suitably GFI protected and all that. So far that part all seems to be fine.

    For the shower mixer, I got a display model Price Pfister from Lowes off the "clearance table" for $10. My problem is that the water just doesn't get hot enough. I don't think it's the water heater - the Titan I bought was a large one, for full house use (I bought this because I got it brand new for cheap on eBay). The reason I don't think it's a water heater problem is that I also installed a foot shower - a second head down low just for rinsing off feet before getting into the tub. I run this head off of the port on the mixer that normally connects to the tub spout, and turn it off with a small valve in the line. This foot shower head seems to get quite a bit warmer. I think the problem is the anti-scald feature in the mixer. Is there some easy way to adjust or turn off that feature? Unfortunately I didn't get any documentation with the mixer.

    If not, I guess I'll ditch the mixer and use separate valves for hot and cold.

    Thanks again!

    Andy

  • #2
    Re: Anti-scald shower mixer question

    Should of put in a ProFlo.

    (Kidding )

    Might be an adjustment under the handle. The temp should be the same. Sometime aeration from a showerhead makes it feel cooler. There is no way that I'm aware of to "turn off" anti-scald in that valve.

    J.C.
    Last edited by BobsPlumbing; 12-09-2008, 12:18 AM.

    Comment


    • #3
      Re: Anti-scald shower mixer question

      both the shower head and foot wash come off the same valve. the temperature should be the same. use a thermometer to test the temperature.

      there is a handle limit adjustment on most anti scald valves. make sure you are getting full range of hot motion. take off the handle and look for a limit stop.

      post a photo of the valve with the trim/ handle off.

      also post a photo of the water heater or a good link to the model and specs.

      it might be a heater issue, it might be a valve adjustment.

      rick.
      phoebe it is

      Comment


      • #4
        Re: Anti-scald shower mixer question

        Originally posted by Andy_M View Post
        Hi Guys,

        Thanks in advance for looking in on my question.

        I decided to install an outdoor shower to rinse off after hot tubbing. I thought it would be a neat feature to have hot water, but the hot water heater is clear to the other side of the property. So, I decided to get a Titan tankless electric heater. I installed this in a NEMA class 4 waterproof enclosure, all suitably GFI protected and all that. So far that part all seems to be fine.

        For the shower mixer, I got a display model Price Pfister from Lowes off the "clearance table" for $10. My problem is that the water just doesn't get hot enough. I don't think it's the water heater - the Titan I bought was a large one, for full house use (I bought this because I got it brand new for cheap on eBay). The reason I don't think it's a water heater problem is that I also installed a foot shower - a second head down low just for rinsing off feet before getting into the tub. I run this head off of the port on the mixer that normally connects to the tub spout, and turn it off with a small valve in the line. This foot shower head seems to get quite a bit warmer. I think the problem is the anti-scald feature in the mixer. Is there some easy way to adjust or turn off that feature? Unfortunately I didn't get any documentation with the mixer.

        If not, I guess I'll ditch the mixer and use separate valves for hot and cold.

        Thanks again!

        Andy


        Go spend $85 on a Delta Monitor Valve and do it right. Money shouldn't be an issue because that electric tankless is very expensive to operate.


        A Price Pfister faucet had me double tripping today, what a surprise.
        Northern Kentucky Plumbers Twitter Feed | Plumbing Videos

        Comment


        • #5
          Re: Anti-scald shower mixer question

          Hi Gents,

          Thanks for all the good info. I took off the handle and fascia and found the adjustment - just as you suggested, it's a little plastic insert that can be in several positions, and controls the handle travel. Bad news is, it was all the way to the hot side already! I think I found a solution, though. As I mentioned, I have a small valve in the line to the foot shower. I didn't mention that I also have a small valve in the line to the main shower head, which is a hand-held type on flex hose. Well, with the foot shower head turned "off", I tried turned that main shower head valve to reduce the flow - not much, maybe 10 or 15% - and the water got hot. Really hot. Opened it up again and water temp returned to "barely warm".... tried it again, same result. I have never looked inside this thing to see how the anti-scald gizmo works but apparently a little back pressure seems to correct whatever the issue is. I still think it's a malfunction but I'm just gonna run it this way for a while and see what happens.

          Regarding the cost of operating this contraption, you're right. The current draw rating is 54 amps at 220VAC. Ouch! In California our electric rates are a bit high, I think one might go broke trying to run a house on one of these things. In my application, though, it runs for maybe 3-5 minutes (usually just a couple of us using the hot tub) 2 or 3 times a week. So with that light usage you never notice it in your utility bill.

          Thanks again for all the help! Great of you to spend your time helping folks out. You're gentlemen & scholars!

          -Andy

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