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If thermostatic bath or shower faucets provide incomparable comfort, they are also more capricious and more fragile than mixers or mixer taps of yesteryear. Here are some dysfunctions often found and how to solve them.

How to solve a flow problem on a thermostatic faucet?

Since the change of the water heater and the safety group, there is a problem with the thermostatic mixing valve. When the temperature at the tap is lowered below 38° C, the flow at the outlet of the mixer decreases until it becomes zero when only cold water is required. All possible settings have been made at the safety group, equipped with a mixed water outlet temperature control valve. The mixer has even been replaced, it does not change anything.
Is it the nature of the security group that enters into "conflict" with the mixer? Should we go back to a mechanical mixer or a conventional mixer?

Remote diagnosis is difficult. Nevertheless, it seems that some thermostatic mixing valves have difficulty managing differences in flow and / or pressure between the hot water circuit and the cold water circuit. The replacement of the water heater and safety group may have altered a previous balance. It would be interesting to test with a conventional mixer and see if the problem persists; probably not.

It is also possible that the outlet temperature of the water heater be too high. The water reaches a temperature exceeding the set point of the tap, it closes purely and simply. This temperature should be set to max. 55° C, the regulating outlet temperature at the tap.

How to solve a whistling problem on a thermostatic faucet?

Since the valve cartridge has been replaced, it has been "whistling" since this change when it was silent with the old cartridge. Why? How to solve this problem?

Whistling can come from either a poorly calibrated cartridge, of a pressure too high. Disassembling it and applying a silicone-based grease can also help to decrease whistling. If, as is likely, this valve is new, it must be returned to the manufacturer to verify the calibration of the accessory.

How to solve a vibration problem when opening a tap?

A shower is equipped with a thermostatic faucet. When opening the tap, a very high vibration noise appears in the pipes, variable frequency depending on the flow rate or the temperature setting. Is it coming from the faucet or the pipe?

The possible causes are multiple. If thehot water is provided by a electric balloon, the problem can come from the security group that does not work normally if it is a bit old. You can test it by opening and closing it manually (which you should also do from time to time), or replace it if no improvement is found.
The problem can also come from theincreased pressure in the network. If the installation is equipped with a pressure limiter, a test must be made by adjusting the pressure around 3 bars, a value commonly used for normal operation of the installation. If there is no limiter, the pressure must be checked and installed if the pressure is excessive.

How to install a thermostatic mixed bath / shower faucet?

On an old installation (center distance 120) bathtub, the faucet is placed on the bath and is 8 cm from the wall. Like installing a thermostatic shower and bath faucet?

To install a new faucet and handshower, you must first cut the water supply, then disassemble the old faucet and check that the hoses correspond to the diameter of the new faucet. If this is not the case, there are connections to screw or weld. A problem may also arise at the center distance, because it is standardized to 15 cm, but, again, there are eccentric connections.
To install the thermostatic valve, position it, connect the hoses loosely to the O-rings, and then fix the valve to the tub by tightening the nut to tighten. Add the shower hose. Attention, the thermostatic valves work by default on a pressure of 3 bars! If the pressure is different, it may affect the actual temperature of the water. This concern can be easily rectified by removing the temperature spider and replacing it at the right place when the temperature actually reaches the required 38° C.

How to solve a temperature problem on a thermostatic mixing valve?

When installing a thermostatic mixer in a shower enclosure, hot and cold water were reversed. Since then, the water supply has been correctly put back in place, but the mixer works poorly (hot, then hot, then warm) and hisses. What happened? Should I change a room?

The temperature adjustment Thermostatic faucet is done at the factory, during manufacture, and can not be modified. Tartar may have entered the faucet at the time of assembly...
To solve the problem, it is best to disassemble the mixer and clean the check valves, which may have blocked, then purge the network and install seals / filters on the water inlets mixer tap.
If this solution gives no result, it will change the mixer.

On the same topic

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    • Italian shower: recessed body for thermostatic mixer
    • Water supply problem: no more hot / cold water pressure
    • Solve a problem of low pressure of hot water after replacement of the safety group
    • Problem of pressure and temperature of water in the shower
    • Noise problem, mixer pressure and water temperature
    • Regulate water in major appliances
  • products
    • Bathroom mixer taps from SARODIS
  • DIY tips
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    • Safety group of a thermodynamic water heater (3)
    • Description of a thermodynamic water heater (2)
    • Installation of a thermodynamic water heater (1)
    • How do thermostatic valves work?

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