Next time you review a wastewater specification requiring a grinder pump, be sure you can see the need for it. Ask yourself these questions: Does the job use small diameter (less than 2”) pipe? Are there extremely long (greater than 500 Ft) pipe runs? Is there an extremely high elevation the wastewater needs to travel (greater than 60 Ft)? If these conditions are NOT present, your customer may need to consider a solids handling pump rather than a grinder. These may seem like fundamental questions, but the need to use grinder pumps to pump “Sewage” is many times misapplied. We offer a full complement of pumps that do a great job of handling Sewage without the addition of a cutter and ring – and the associated wear and maintenance costs with these parts.

Visit the Bell & Gossett website to see all of our Sewage and Grinder pump offerings.

As featured in OILHEATING Magazine’s August and September issues, Bell & Gossett’s Counterpoint: How Hydronic System Components Really Work is a wealth of information. This 40-page manual presents details on system components and their roles in the hydronic system. Find out how an ASME relief valve protects the boiler and the system. Understand the concept of a pressure reducing valve. Know why you need a low water cut-off. Learn about the different types of circulators, air separators and much more.

Download your copy now or contact your local representative for a copy.

At some point, you probably had to convert a hydronic system that was designed for water over to glycol. Designing a new system using glycol is pretty straightforward because you know all the design information. For an existing system, where you may not have the plans or the resources to go back and lay it out, you will need to rely on some ingenuity and estimating. To help, ESP-PLUS^® has a built-in Glycol Wizard.

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You will notice the deliberate absence of a recommended pipe size in the System Syzer application. Several criteria must be weighed against one another for proper pipe sizing. The value of each characteristic will vary by project. For example, initial equipment and installation cost must be weighed against operating cost. Velocity noise must be balanced against air entrainment. The ASHRAE fundamentals handbook states the general range of pipe friction loss used for the design of hydronic systems is between 1 and 4 feet of loss per 100 feet of pipe. While this rule works well for most residential and small/medium sized commerical applications, it becomes flawed as the pipe diameter increases. Velocity becomes increasingly important as the pipe size increases, which the following chart indicates. For example, 4'Loss/100' with 24" pipe would have an unacceptably high velocity of 20 FT/SEC. This is why Syzer shows both Friction Loss and Velocity results.