Pumps, pressure, and machines that outlived their makers
Selecting a DN15 Stainless Steel Ball Valve
Match DN15/1/2-inch connections, bore or Kv, wetted materials, pressure-temperature limits, dimensions, and actuation with a supplier checklist.
By Walt Brenner · 4 September 2026 · 16 min readLatest
DN25 Check Valve Selection: Sizing and Compatibility
Evaluate fluid, contaminants, flow range, pressure-temperature limits, pressure loss, connections, orientation, leakage and surge before purchase.
Water Well Installation: Process, Costs & Planning
Explains how a potable well is sited, approved, drilled, connected and tested for pressure, household demand, contamination risks and water quality.
External Gear Pump: Operation, Sizing & Selection
Calculate displacement from flow, speed and efficiency, then check pressure, viscosity, inlet conditions, compatibility and performance curves.
Hydraulic Pump for Log Splitter: Sizing
Use GPM-to-horsepower ranges to narrow options, then verify stage flows, RPM, rotation, shaft, mount, ports, dimensions, and pressure ratings.
Septic System Air Pump: Sizing and Replacement
Match airflow at operating pressure, then verify power, tubing, controls, alarms and system approval before buying a replacement.
Insulated Pump House: How to Choose
Work backward from equipment, winter conditions, maintenance paths, moisture and failure risks; compare usable dimensions and total installed cost.
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Arizona Pool Pump Off-Peak Savings Before an Upgrade
Compare APS and SRP pump schedules, calculate time-of-use savings, and see whether retiming should come before a variable-speed replacement.
Audi EA839 Water Pump Lawsuit: Quote Spread and TSBs
Compare Audi EA839 water-pump quotes, review models named in Larr v. Audi, and see what the reported bulletins and proposed lawsuit establish.
How to Choose a Ball Non-Return Valve
Match flow and differential pressure to orientation, wetted materials and connections, then verify installation requirements and troubleshoot by symptom.
Jeep Wrangler Power Steering Pump Recall: What Gets Fixed
Check whether a 2021–2025 Wrangler, Gladiator, or 4xe is in the recall range, what dealers replace, and why parking outside beats a pump swap.
Well Water Air Injector Pros and Cons: When It Fits
See when it suits compatible iron or sulfur, plus how water chemistry, pump and drain capacity, backwash, noise and maintenance affect the choice.
Reducer Bushings: Types, Sizes, Selection & Installation Guide
A reducer bushing is a compact fitting used to connect pipes, fittings, or equipment ports of different nominal sizes. Selecting one correctly requires more…
Voltage Sensitive Relay: How It Works and When to Use One
A voltage sensitive relay can make a dual-battery system seem simple: start the engine, charge both batteries, stop the engine, and isolate the starter…
Hydraulic Pressure Switch: Selection, Types, Testing & Specs
A hydraulic pressure switch cannot be selected safely or reliably from its PSI range alone. The switch must trip and reset at the required pressures, remain…
TEFC Motor Meaning: Cooling, Protection, and Uses Explained
TEFC stands for “Totally Enclosed Fan Cooled”: it describes an electric-motor enclosure and cooling arrangement in which ambient air does not circulate freely…
Cost of Motors per HP: Price Examples, Formulas & Calculator
No supported universal or representative industry-average cost of motors per hp is available from the cited sources. For an industrial electric motor, cost per…
Normally Closed Solenoid Valve: How It Works and How to Choose
A normally closed solenoid valve is closed when its coil is de-energized and opens when energized under the model’s specified electrical, pressure, flow-…
Can I Still Buy a Single-Speed Pool Pump Motor?
Check your motor’s total horsepower against the 2025 standard, delayed 2027 enforcement window, and March 2029 cutoff before buying.