ECM Smart Pump technology seems to be the buzz in marketing and sales of hydronic and plumbing products. There is a definite advantage to ECM …
Temperature Balancing Valves with Bypass Options in Domestic Water Recirculation Systems
In the last R. L. Deppmann Monday Morning Minutes, we introduced the newest addition to the art of balancing in domestic hot water recirculation systems …
Temperature Balancing Valves in Domestic Water Recirculation Systems
In last week’s R. L. Deppmann Monday Morning Minutes, I reviewed the Bell & Gossett Circuit Setter manual balancing solution and suggested that it is …
Flow Balancing Valves in Domestic Water Recirculation Systems
The prevention of Legionella growth in plumbing systems is a topic on most of our minds. As a result, plumbing industry standards are paying a …
Plumbing Topic: Domestic Water Recirculation Systems Part 6
High Rise Considerations The last article, part 5, showed an example of a high rise system with pressure reducing valves (PRVS) and the importance of the correct setting of the balance valves. The example we used showed balance valves with as much as 18 PSIG across them at a low flow. When a design starts to incorporate
Plumbing Topic: Domestic Water Recirculation Systems Part 5
High Rise Considerations The last article, part 4, showed an example of a high rise system with pressure reducing valves (PRVS) and their effect on …
Plumbing Topic: Domestic Water Recirculation Systems Part 4
The last three articles outlined pump selection in domestic water recirculation systems. In general, these systems have low flow and low head pumps. What happens in a high rise with pressure reducing valves (PRV) in the hot water supply? The pressure reducing valve introduces a fixed pressure drop which must be added to the calculations.