Pull the handle of the water feed valve back to allow water to flow into the boiler. Keep a close eye on the water level in your sight glass. When the water has reached an appropriate level, push the handle of the feed valve up to the closed position.

Hot water heating systems are built around the premise of radiant heat. Water is heated by a boiler and circulated throughout a building--usually homes (older homes, especially)--through a series of pipes that heat radiators that give off heat.

Once I saw on an episode of This Old House that they were putting in hot water return lines: pipes that recirculate idle hot water back to the heater so you get hot water right away, instead of wasting time and water.. My wife and I are looking to getting our first home and I think this might be a beneficial investment to make at some point.

In these hot water systems, once the radiator or baseboard convector is heated with the hot water, the cooled water is returned back to the boiler to be reheated, and the water circulation loop continues. Understanding the components of a hot water boiler helps you with basic troubleshooting steps.

Guide to Heating System Circulator Pump Location & Mounting ... (If a hot water system piping or boiler contains more than a few bubbles of air the system is likely to become Air-bound and heat will be lost or missing in all or part of the building. ... (usually located on the return end of the hot water piping close to the heating boiler).

Over-the-water-heater: For this configuration, the pump is located above the water heater, and a check valve is located under the sink furthest away from the hot water heater. In this configuration, the pump pressurizes the hot side of the system and, through the bypass valve under the sink, it pushes the hot water into the cold water system, creating a hot loop.

Where to connect hot water recirculation line at water heater? Author: gplumb (NC) I am installing a hot water recirculation system with a dedicated return line and a circulation pump at the water heater. There are two options for connecting the return line - the bottom of the water heater tank at the drain or to the cold water inlet at the top.

Secondary plumbing returns are a hot water recirculation system that typically consist of a copper pipe and tee system. Secondary returns connect to your household water supply lines to recirculate hot water back to the water heater or point of use. This recirculation by the return ensures hot water is always available at the point of usage.