This week our R. L. Deppmann Monday Morning Minute article answers a question about acceptance volume vs. usable volume in a hydro-pneumatic expansion tank. I recently …
Hydropneumatic Tanks for Variable Speed Pressure Boosters, Part 4
In the last three RLD Monday Morning Minutes, I made the case for a pre-pressurized tank in variable-speed pressure booster systems. Today, let’s look at …
Hydropneumatic Tanks for Variable-Speed Pressure Boosters, Part 3
In the last RLD Monday Morning Minute I described the pre-pressurized tank sizing for constant-speed booster systems. There are those who say, “My pressure booster system is …
Hydropneumatic Tanks for Variable-Speed Pressure Boosters, Part 2
In last week’s RLD Monday Morning Minute, I described a brief history of pressure-boosting systems and the introduction of the pre-pressurized tank. This week we continue …
Hydro-pneumatic Tanks for Variable Speed Pressure Boosters, Part 1
Possibly only engineers, like myself, can appreciate controversy in plumbing system design. The use and sizing of storage tanks in variable speed pressure boosters is …
Using the New Bell and Gossett System Syzer Programs
Xylem Bell and Gossett recently announced the new System Syzer programs for your computer. You may download these through links on our website at the www.deppmann.com/resources/ page. This new tool has a powerful lineup of useful features. Let’s look at a couple of them.
A Cost Effective Domestic Water Recirculating for smaller systems
In today’s economy there are many small office, retail, and tenant fit-out work jobs than large expansive projects. These smaller projects come with tighter budgets. Here is a tool you may not be aware exists. Bell and Gossett ECO-CIRC under sink recirculating pump available for tank type water heater as well as tank-less systems. High efficiency and lead free brass construction.
Plumbing Topic: Domestic Water Recirculation Systems Part 8
“Dual Temperature Systems and Mixing Valves” “Performance Conditions of a Mixing Valve” Last week the R L Deppmann Monday Morning Minute article examined the addition of a mixing valve. Today we will examine the re-circulation system with dual temperature requirements and answer questions about the term “Performance Conditions” mentioned in the Lawler literature.
Plumbing Topic: Domestic Water Recirculation Systems Part 7
“Addition of a Mixing Valve” During the last 6 weeks, the R. L. Deppmann Monday Morning Minutes concentrated on re-circulation systems where the supply temperature to the system was the same as the outlet temperature of the water heater. Today we will examine the addition of a Lawler master mixing valve in the system.
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