Domestic Hot Water Recirculation System Design

A hot water recirculation system is a plumbing system that moves hot water to fixtures quickly without waiting for the water to get hot.

Domestic hot water recirculation system design. Rather than relying on low water pressure common in most water lines recirculating systems rapidly move water from a water heater to the fixtures. As a rule if it take more than 5 seconds for hot water to reach a faucet installing a recirculating pump could save you money in the long term. A recirculation system is designed to make hot water available at the tap nearly instantly. A hot water recirculation system is designed to provide hot water to each of the home s hot water taps instantly.

Over the past few years dhwr lines have become popular in residential applications as well. A hot water recirculating system may be a big investment for small families but it can be a great way to save money in a large household where hot water is in greater demand through a larger area. Near the water heater area a recirculating pump pulls the water from the furthest fixture back into the water heater creating a loop. Recirculating domestic hot water systems 1 klein gary.

Using the suggestions above our example will require a pump for 8 gpm. Dissipated from the hot water distribution piping into the building adds to that building s cooling load resulting in further energy costs. 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. What is an acceptable temperature drop in domestic hot water recirculation design.

In fact we see the exact same model recirculation pump used in application after application without incident as this one pump is typically able to meet the minor head and flow requirements of most recirculation systems. In sensible plumbing fhb 216 master plumber dave yates addresses whole house plumbing design. Beyond providing convenience and increased comfort a recirculation system can save 10 000 15 000 gallons of water each year that would otherwise go down the drain as a homeowner waited for hot water to travel from the water heat. Designing a domestic hot water recirculation system is not typically difficult.

I will not design a building with a demand circulator connecting the domestic hot water to the cold water pipes. Hot water distribution systems part 1 plumbing systems design. I prefer minimizing liability and designing hot water systems the correct way with a dedicated hot water return piping system in the original design. Adding a return line to the domestic hot water system creates a closed loop path that allows the water to circulate back to the water heating source to keep the lines warm when fixtures and.

A more advanced plumbing technique is the integration of a hot water recirculation system.