What is a thermostatic mixing valve used for?

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A thermostatic mixing valve (TMV) bridges the hot water in your system and the water that comes out of taps or showers. It keeps your hot water system safe in a couple of ways. First, it allows your system to store water at a high enough temperature to keep bacteria at bay.

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This is typically attached directly to the shower, or under the sink, to control the water temperature and provide anti-scald protection. There is a specialty type of emergency thermostatic mixing valve, which is specifically designed to provide tepid water for emergency eyewash or shower drench applications.

Beside this, Where are thermostatic mixing valves required?

For combined heating hot water and domestic hot water systems, when the heating hot water system exceeds 140°F the IPC code requires a temperature actuated mixing valve conforming to ASSE 1017 to limit the domestic hot water temperature to a maximum of 140°F.

Likewise, Why do I need a mixing valve?

A mixing valve reduces the temperature at the faucet, so your family can use the sink, shower or tub with less fear of scalding. Burns can occur quickly, but Honeywell mixing valves help prevent scalding. In fact, Honeywell mixing valves meet the most stringent safety standards in the industry.

Also, Do I need a thermostatic mixing valve?

Thermostatic mixing valves on your water heater are essential to prevent scalding and control the temperature of water at the delivery point. It allows you to increase the heater temperature, killing off harmful bacteria.

Where is a thermostatic mixing valve located?

This is typically attached directly to the shower, or under the sink, to control the water temperature and provide anti-scald protection. There is a specialty type of emergency thermostatic mixing valve, which is specifically designed to provide tepid water for emergency eyewash or shower drench applications.

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22 Related Question Answers Found

 

Do I need a mixing valve on my hot water heater?

Thermostatic mixing valves on your water heater are essential to prevent scalding and control the temperature of water at the delivery point. It allows you to increase the heater temperature, killing off harmful bacteria.

Where do you put a thermostatic mixing valve?

This is typically attached directly to the shower, or under the sink, to control the water temperature and provide anti-scald protection. There is a specialty type of emergency thermostatic mixing valve, which is specifically designed to provide tepid water for emergency eyewash or shower drench applications.

Where is the tempering valve located?

The tempering valve is installed at the outlet of the hot water storage tank, and its output is then piped out to the hot water distribution of the facility.

How do you adjust a thermostatic mixing valve?

To adjust the mixed outlet temperature of the valve, remove the cap to gain access to the adjusting spindle. The spindle should be rotated-clockwise to reduce the temperature, counter-clockwise to increase the temperature until the desired set point is reached.

What is the purpose of a mixing valve on a water heater?

Adding a Tank Booster mixing valve to a water heater allows water to be stored at a higher temperature, but safely delivered at 120°F (49°C) to all outlets. The valve mixes both hot and cold water, which increases the tank’s water capacity.

What is a tempering valve on a hot water heater?

A tempering valve is an adjustable 2-inlet mixing valve which is temperature activated and used to moderate a hot water flow by mixing the hot water with cold water to achieve ≅50°C (122°F). This reduced temperature water is then delivered to the taps and shower heads around your home.

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Are mixing valves required?

Master mixing valves are not mandated in the model plumbing codes, but it is good design practice for a constant hot water supply temperature. Domestic hot water systems are unique in that a change of equipment in one part of the system can and most likely will affect the performance of another part of the system.

Are TMV a legal requirement?

In terms of existing laws on the practice, or rather, placing of thermostatic mixing valves, and current legislation dictates (Part G of the Building Regulations Act) that TMV technology must be fitted as standard procedure on baths in new build homes, yet there’s no equivalent regulation to cover existing properties.

How long does a tempering valve last?

5-8 years

How many outlets can a TMV serve?

How many outlets can I have per Thermostatic Mixing Valve (TMV)? In TMV2 applications the number of outlets is dependent on the pressure and flow rate required at the outlet, however, it is quite common to see 3 or 4 outlets.

What happens when a mixing valve fails?

If a TMV valve stops working correctly, then you may notice that your hot water suddenly starts to run hotter than it should. … Sometimes, a failing TMV makes the water too cold. Or, water may not run at the right temperature consistently. It may fluctuate between being hot and cold.

How does a hot water tempering valve work?

A tempering valve mixes hot and cold water to create water at the perfect temperature to distribute to sinks and showers. They are typically used in hotels or office buildings, anywhere where there is centralized delivery of hot water. If the water delivered is too warm, scalding can occur.

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