PumpOps
Engine Pressure Calculator
Free · Designed for iPad. Not verified for macOS.
Pump calculations in seconds.
PumpOps is a fast, dead-simple engine pressure calculator built for fire apparatus engineers and operator candidates. Pick your nozzle, hose, and layout - the pump discharge pressure updates instantly, with the full equation shown so you always know where the number came from.
BUILT FOR SPEED
- One screen. Instant PSI.
- Live equation breakdown: NP + FL + Appliances + Elevation
- Friction loss shown per 100' for every hose selection
COVERS THE FULL LAYOUT
- Fog and smooth bore handline nozzles
- Master streams, monitors, deck guns, and ladderpipes
- Up to three hose lays, including two- and three-line big water
- Appliances: wye, siamese, monitor, ladderpipe, standpipe
- Elevation by floor or by feet, above and below grade
- Helicopter fill lays included
REFERENCE AND TRAINING TOOLS
- Interactive formula calculators: friction loss, nozzle discharge, standpipe ops, relay pumping, and more
- Hose coefficient calculator with a live flow scale
- Nozzle GPM and pressure quick-reference tables
- Over-pressure warning when a layout exceeds safe pumping limits
MAKE IT YOURS
- Save and name your favorite hose lays
- Drag to reorder presets so your most-used lays are on top
- Color, dark, and light themes with adjustable display size
TRAIN WITH CONFIDENCE
Every calculation follows standard fireground hydraulics used in apparatus operator training, verified against department-style pump charts.
DISCLAIMER: PumpOps is for training purposes only. It is not a substitute for department policy, certified training, or fireground judgment. Always verify pressures against your department's current procedures.
Ratings & Reviews
APPLE WATCH APP
The main screen, on your wrist. Nozzle, three hose lays, appliances and elevation, and the pump pressure as you turn the crown — the same numbers the phone gives you, off the same department friction loss tables, with the same warning when you go over the ceiling. It runs on the watch alone, so you do not need the phone out of your pocket at the panel.
CHECKLIST
Your own lists for the things you do every time — coming on duty, packing for an out-of-station shift, packing to go home. Name a list, add your items, tick them off. Reset clears the ticks and keeps the list, and stamps the date you reset it so you know it was today's run. Keep as many lists as you want.
GARDEN HOSE FOG NOZZLE 3/4"
In the nozzle list at 10 GPM and 50 PSI, for the times you are pumping something that is not a fire hose.
CHANGE OVER
A change over you share no longer counts the boxes at the bottom. Most of that list does not apply on any given shift, and "6 of 13" read to the oncoming engineer like seven things nobody did.
Also: What's New now recaps 1.3, 1.2 and 1.1 underneath the current release, in case you skipped an update.
The developer, TREVOR GREENWOOD WILLIAMS, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- TREVOR GREENWOOD WILLIAMS
- Size
- 9.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 11.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Trevor Williams
