Vibration-isolated, NFPA 20–compliant bases for reliable fire pumps
Bunney’s Inc. designs, pours, and rehabilitates fire pump foundations that stand up to Arizona heat, caliche soils, and monsoon moisture. We engineer rigid, level bases that control vibration, protect alignment, and meet the intent of NFPA 20 and manufacturer requirements—so your fire pump delivers rated flow and pressure when it matters.
New to Bunney’s? Learn who we are and explore our capabilities.
Why choose Bunney’s
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Arizona-ready engineering: Soil reports, ring beams, moisture barriers, and UV/thermal-resistant details for desert environments.
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Code & OEM alignment: Layouts, anchor bolt templates, grout specs, and hold-down details coordinated to NFPA 20 and pump/motor/driver cut sheets.
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Vibration control: Inertia blocks, isolation pads/springs, and precision shimming to reduce transmitted vibration and protect couplings and bearings.
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End-to-end delivery: Survey, excavation, formwork, rebar, embeds, pour, cure, grout, and final anchor tightening with as-built documentation.
Foundation types we build
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Monolithic concrete slabs/housekeeping pads for small jockey pumps.
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Inertia bases sized 1.5–3× the rotating mass to reduce vibration.
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Isolated foundations with neoprene or spring isolators and grout pockets.
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Retrofit pedestals & risers to correct elevation, drainage, or misalignment.
Design considerations (user-first checklist)
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Load & stiffness: Foundation mass, section thickness, and rebar to resist dynamic forces and prevent cracking/settlement.
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Level & flatness: Tight tolerances to maintain driver–pump alignment and coupling life.
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Anchorage: Proper embedment, edge distances, and template-set anchor bolts to manufacturer torque specs.
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Grouting & baseplates: Non-shrink grout selection, air-release paths, and cure times for full bearing.
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Environment: Vapor barriers, perimeter drains, and coatings where chemicals or washdowns are present.
Our build process
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Site walk & submittals – verify loads, layouts, and utilities; submit mix designs and shop drawings.
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Form & reinforce – place rebar, sleeves, and anchor templates; QA checks before pour.
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Pour & cure – control joints, finish, moisture cure; strength verification (breaks).
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Set equipment & grout – align bases, place non-shrink grout, torque anchors.
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Turnover – provide as-builts, cure logs, torque/level reports, and maintenance guidance.
Upgrades & repairs
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Crack injection, spall repairs, and surface reprofiling.
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Anchor bolt replacements/additions and baseplate leveling.
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Isolation retrofits (springs/pads) and inertia mass increases.
Preventive care
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Annual level/alignment checks, anchor re-torque, grout condition review, and vibration trend monitoring—often scheduled alongside pump performance tests.
Ready to plan your project? Get a site walk and a budgetary estimate from our environmental systems team.
Helpful links
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Plan the equipment pad with Concrete Flatwork
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Repair or restore existing containment with Concrete Repairs
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Route influent/effluent lines via Utility Trenches
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Keep systems tuned with Facility Maintenance
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Safely daylight and tie into existing utilities with Hydro Excavation
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Manage runoff at outfalls with Erosion Control
FAQs
How heavy should a fire pump foundation be?
A common rule is at least 1.5× the combined rotating mass of pump, driver, and base—often more for challenging vibration conditions. Final sizing is based on loads, speed, and OEM guidance.
Do you install inertia bases and isolation?
Yes. We design and install inertia blocks with neoprene or spring isolators, including grout pockets and flexible connections to limit transmitted vibration.
How long before equipment can be set on the new pad?
Typical guidance is 3–7 days for initial set and up to 28 days for full design strength, depending on mix, temperature, and load. We’ll schedule setting/grouting to your timeline.
Can you retrofit an out-of-level or undersized pad?
Often. We can reprofile, add risers, replace anchors, or increase mass without a full demo, minimizing downtime.
Do you coordinate with the fire pump vendor and NFPA 20?
Absolutely. We build to NFPA 20 intent and coordinate anchor patterns, grout types, and tolerances with the pump/driver/OEM submittals to protect warranty and performance.
