The Castair VP1004 is a set of four 4" x 4" x 1" rubber vibration pads for air compressor installation. Buying as a set of four covers all four feet on a standard two-tank or single-tank compressor with four contact points — one pad per foot, one order, done. These pads go under the compressor feet before installation to isolate the compressor from the floor, reduce vibration transmission, prevent the unit from walking under load, and protect the floor surface underneath.
Why a Set of Four
A standard horizontal or vertical tank compressor has four feet or four tank saddle contact points. You need one pad under each contact point for consistent, stable vibration isolation across the entire base. Using fewer pads creates uneven contact — the unsupported corners still transmit vibration and the compressor can rock slightly, which stresses tank saddles and mounting hardware. A complete set of four ensures the compressor sits level and stable with consistent isolation at every contact point.
Key Features
- Dimensions: 4" x 4" x 1" per pad — a common fit for shop compressor foot dimensions in the 3-15 HP range
- Set of 4: Complete set for a standard 4-foot compressor installation — one order covers the whole unit
- Rubber Construction: Anti-vibration rubber with appropriate durometer for compressor weight loads
- Vibration Damping: Absorbs pump and motor vibration at the floor contact points
- Non-Slip: Prevents compressor from walking or moving under vibration load
- Floor Protection: Protects epoxy, painted, or bare concrete floors from compressor foot wear and abrasion
Vibration Pads vs. No Pads
Installing a shop compressor directly on concrete with no isolation is the default for most quick installations — and it's the wrong way to do it. Direct concrete contact means:
- Every reciprocating vibration cycles directly into the slab, which acts as a resonating surface and amplifies compressor noise throughout the building
- The compressor can walk over time, putting stress on flex hoses, hard lines, and electrical connections
- Compressor feet wear into the floor surface, making future repositioning difficult
- In buildings with lightweight floor construction, vibration can be felt throughout the structure
Four rubber pads at $34.95 for the set is one of the best value-per-result purchases in a compressor installation. Do it right the first time.
Available Vibration Pad Options
- VP1575 ($4.62) — 1.5" x 3/4" round rubber pads, set of 4 — small compressors and equipment with small feet
- VP100 ($9.24) — 4" x 4" x 1" individual rubber vibration pad — single pad
- VP1004 ($34.95) — 4" x 4" x 1" rubber vibration pads, set of 4 (this product)
- VP1003 — Castair VP1003 Vibration Pad — contact us for specs
What's in the Box
- 4x Rubber vibration pads, 4" x 4" x 1" each
Technical Specifications
- Part Number: VP1004
- Manufacturer: Cast Air / Castair
- Dimensions (each pad): 4 inches x 4 inches x 1 inch
- Quantity: Set of 4
- Category: Accessories
- Price: $34.95 per set
Load capacity per pad and specific rubber compound/durometer were not confirmed from manufacturer data. For very heavy compressors (above 500 lbs.), contact us to confirm this pad is rated for your application.
Why Buy From Air Compressor Factory Direct?
- Castair Parts Specialist: We stock the complete Castair vibration isolation pad lineup
- Free Shipping: On qualifying orders to the contiguous US
- Free Tech Support: Call 866-217-0063 for installation guidance or help selecting the right pad for your compressor weight and foot dimensions
- OEM Parts: Castair-specified vibration isolation components
- Full Manufacturer Warranty: Backed by Castair's standard product warranty
Call 866-217-0063 for quick answers and help!
