How hot is hot water
- Thread starter Ken13559
- Start date
The filter should be right after the pump and before the water heater. If this is a faucet mounted filter you only run cold through it...
The correct answer is that filters and filter housings made of 'plastic' or 'plastic' components should never be used in water that is above 170°F. ... the softening/melting point of most of these 'plastics' is ~180°F/82°C.
So, the answer is: if your engine is operating at 180°F and that 180°F engine water is feeding your hot domestic water heater and the engine is run for long periods of time ... you can assume that the hot domestic water inside that water heater can be 'close' to that 180°F ... at a maximum.
FWIW - most plumbing codes for domestic hot water recommend hot water not to exceed 120°F due to the potential of BURNS. Where the water can exceed these temps it is usually recommended that a 'mixing valve' be applied to allow cold water to mix with the effluent hot water from the 'heater' and to deliver a max. of ~120° into the distribution system. "Boat codes" usually dont have these recommendations.
So, the answer is: if your engine is operating at 180°F and that 180°F engine water is feeding your hot domestic water heater and the engine is run for long periods of time ... you can assume that the hot domestic water inside that water heater can be 'close' to that 180°F ... at a maximum.
FWIW - most plumbing codes for domestic hot water recommend hot water not to exceed 120°F due to the potential of BURNS. Where the water can exceed these temps it is usually recommended that a 'mixing valve' be applied to allow cold water to mix with the effluent hot water from the 'heater' and to deliver a max. of ~120° into the distribution system. "Boat codes" usually dont have these recommendations.
Your water heater outlet may have a "tempering valve". This will reduce the temperature of the hot water in your system to 120~140 F no matter what the engine temperature is.
Most boat heaters dont have them, theyre usually installed near the outlet device, such as a bathroom shower, etc.; although, some stringent codes require them at the outlet of the water heater.
In any case, here ya go for an example: http://www.powerscontrols.com/pages/product_full.asp?pid=6955&parCat=2195&ref=2
In any case, here ya go for an example: http://www.powerscontrols.com/pages/product_full.asp?pid=6955&parCat=2195&ref=2
Here's another one:
http://forums.catalina.sailboatowners.com/showthread.php?p=1158998&highlight=mixing valve
Scroll to the top for the entire discussion.
From a search on mixing valves by Maine Sail.
http://forums.catalina.sailboatowners.com/showthread.php?p=1158998&highlight=mixing valve
Scroll to the top for the entire discussion.
From a search on mixing valves by Maine Sail.
The hot, hot water is one reason I installed single lever faucets on all my sinks and showers. I can mix the cold without having all hot water scald you.