What is the purpose of a hot water return line?
A hot water recirculation system is a plumbing system that moves hot water to fixtures quickly without waiting for the water to get hot. Rather than relying on low water pressure, common in most water lines, recirculating systems rapidly move water from a water heater to the fixtures.
What is a recirculating line?
In a traditional hot water recirculating system, there is a dedicated return line for the hot water pipes, which runs from the furthest bathroom or fixture back to the water heater. Near the water heater area, a recirculating pump pulls the water from the furthest fixture back into the water heater, creating a loop.
What is dedicated return line?
The Dedicated Recirc System converts an existing hot water circulation line into an efficient on-demand delivery system. The Dedicated Recirc System delivers hot water only when there is a demand: Reducing Energy Costs. Virtually Eliminating Pinhole Leaks.
How do you size a hot water circulating pump?
1 GPM = 10,000 BTU/hr, meaning that for every 10,000 BTU’s of heat load the circulator must output a 1 gallon per minute flow. Assuming that system calls for 100,000 BTU/hr, a circulator pump should have a minimum 10 Gallons Per Minute flow rate at a given pressure drop.
Where is the return line on a water heater?
Pump at the water heater (dedicated return line) Pumps located at the water heater are suitable for installations with a pre-installed hot water return line. The building’s main hot water line is kept primed with hot water without pushing any hot or warm water into the cold water supply.
Do you need a return line for a hot water recirculating system?
If you have a dedicated return line, then this is a great system to use. You can even get pumps that have timers built in, so the pump only runs during the hours you need it, offering you savings on energy costs. This type of recirculating system does not require a dedicated hot water return loop, it can be installed and used in any house.
When to use return pipe for hot water heater?
Return pipes are used when hot water is required available continuously at the fixtures. Typically for systems where the distance from the hot water heater to the consumption fixtures exceeds 25 – 30 m. A smaller pipe with an inline pump is connected to a point close to the most distant fixture and to a point close to the hot water heater.
How does the cold water return to the hot water heater?
They return the non-hot water into the cold water supply line until the hot water is sensed at the fixture (the water is returned to the hot water heater via the cold line). Because the pump is located right at the fixture, hot water is available to that fixture very quickly.
What is hot water return loop?
A hot-water loop uses a small pump to circulate hot water between a water heater and a distant bathroom or kitchen. Creating the loop is fairly easy; however, doing so in a way that doesn’t waste a lot of energy is a little trickier.
How do hot water recirculation pump work?
- A recirculation line is a separate water pipe that runs off the hot-water line from the farthest plumbing fixture back to the water heater.
- A pump at the water heater moves hot water through the recirculation line.
- A check valve must be installed in the line to ensure hot water only goes in one direction.
- An aqua-stat is mounted to the hot-water pipe.
What is continuous hot water?
What is Continuous Flow Hot Water? A continuous flow hot water system is usually a smaller, wall mounted unit that heats the water as you use it, rather than storing it like more traditional hot water systems will do. As the name suggests, the unit provides continuous water flow until the shower or the tap being used is turned off.
What is hot water recirculation?
Hot water recirculation means a continuous flow of hot water in the hot water supply line of your home. Without a “recirc” system, unused hot water in the line cools and must be evacuated before hot water from your hot water heater can reach the desired faucet.
