Mixet is owned by "Alsons" they have a web-site...you have either installed the cartridge in-correctly or you have installed the wrong cartridge. Very common to have a "cross-connection" between the hot and cold in either of the instances. erik

I've installed several Mixet shower valves including the commercial variety with the builtin stop valves to allow cartridge change without turning off the water anywhere else. On all the Mixets I've seen you would have to move the cartridge to either cold or hot before shutting off the flow if you intend to prevent crossover. I have three of the Mixet showers at my home and crossover has not been a problem even though I have a hot recirculation loop from the master bath to the water heater in the garage. We leave the valves in a mixed position pretty consistently. Again, when you need to stop crossover just move the cartridge to cold or hot (90 degrees from center warm position).

Hot water return-line has no bearing in a cross connection/bypass if installed correctly...One should not have to turn the cartridge to either the hot completely or the cold completely to prevent bypass if the cartridge is in good working order and it is indeed the correct cartridge for the model valve. You have solved your own problem with the way you operate your own..perhaps it will help others. erik

btw......nice to see that some are reading "old threads". Most answers can be found if one is willing to spend a little time going back to review past issues. erik

I've got a Mixet shower fixture -- http://www.plumbersurplus.com/pdf/02336.pdf. I'm having a problem with little to no hot water coming out of the faucet or showerhead. Does the pressure balancing spool need to be adusted or set in a certain rotation (it's 2-pc, inner piece slides into the outer pc)? I turned off both the hot and cold water spring checks (see pdf doc) then I removed the Mixet stem. I turned the cold water back on and the flow was fine out of the pipe of the Mixet housing unit. I then turned the cold water off and turned the hot water back on but no hot water flowed. Next I turned the hot water off, removed the balance spool, reinstalled w/o it's inner piece and turned the hot water back on. The hot water flowed fine. The inner pc of the pressure balancing spool slides in/out and rotates easily within the outer pc of the pressure balancing spool -- appears to me to be self-adjusting. It doesn't appear to me that the stem physically interacts with the balancing spool -- other than via the water pressure. I'm reluctant to leave out the inner pc of the pressure balancing spool as a permanent fix -- not sure if it'll blow out seals of the stem. Any thoughts? I did a google search but wasn't able to find anything on it.

I have to change these Mixet cartridge's about every 2 months!! They last for a few weeks and then start dripping again all day long? What is going on..ANY ideas?

I have to change these cartridge about every 2 months!! The last for a few weeks and then start dripping all day long? What is going on..ANY ideas?

Your problem is the seat in the back of the body. When you turn the center knob in(out side part) it has a washer that seals the water to the exit port of the body, as with all mixit valves they have a cam lobe to balance hot & cold water.

I have two mixet shower valves. I can't rotate the temperature controls handles without "slamming them" hard!!!, with the palm of my hand. Is there anyway I can "free them up". Both are installed in 20 year old ceramic tiled baths. I do not want to rip them out, i'd never find matching tiles.
Mike

We had to shut off the water first before we can move the control handle. Another site stated to loosen the cartridge, which seem to help.

MIXET IS THE MOST USELESS SHOWER STEM. I HAVE REPLACED ABOUT 7 IN THE LAST 14 YEARS IN 3 OF MY PROPERTIES. I HAVE OTHER PLACES PRICE PFISTER & NEVER REPLACED EVEN A SINGLE ONE IN THE LAST 24 YEARS AT OTHER PLACES. WHEN I WILL RIP OFF THE KITCHEN CABINETS, THEN I WILL REPLACE THIS GARBAGE WITH PRICE PFISTER & DO MY SOLDER JOB.

I would like to replace my mixet tub valve but the nut that holds the valve in place must be corroded on the inside and I cannot get it loose. I am afraid to put too much pressure on it.
Any suggestions?

I suggest cranking the crap out of it and getting it off. No other way.

Then, if it breaks, you can upgrade to a better faucet valve.

You won't regret it.

Just replaced the third one.I'd like to tell the inventer of these horrible nightmares what i really think of them... They suck big time!!! Home depot has the valve and at a reasonable cost. Do not go to a plumbing shop as they will rip you off. It's working fine hold your breath mix-et owners.

I just installed my mixet MXT07 and the temperature will not get hottest nor colder. The water comes out consistently warm? How do I fix this?

The single handle valve keeps eating the sitting ring or washer. This has happened twice in the last three days. How do you fix this sort of problem? I am frustrated!